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508669397 = 1690130097
BaseRepresentation
bin11110010100011…
…010110111010101
31022110011002020022
4132110122313111
52020204410042
6122250314525
715414422105
oct3624326725
91273132208
10508669397
11241148935
12122428a45
13814cc112
144b7b1205
152e9cbcd2
hex1e51add5

508669397 has 4 divisors (see below), whose sum is σ = 508716396. Its totient is φ = 508622400.

The previous prime is 508669363. The next prime is 508669453. The reversal of 508669397 is 793966805.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 277355716 + 231313681 = 16654^2 + 15209^2 .

It is a cyclic number.

It is not a de Polignac number, because 508669397 - 212 = 508665301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508669097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853 + ... + 31949.

It is an arithmetic number, because the mean of its divisors is an integer number (127179099).

Almost surely, 2508669397 is an apocalyptic number.

It is an amenable number.

508669397 is a deficient number, since it is larger than the sum of its proper divisors (46999).

508669397 is a wasteful number, since it uses less digits than its factorization.

508669397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46998.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 508669397 is about 22553.7002950735. The cubic root of 508669397 is about 798.2615358520.

The spelling of 508669397 in words is "five hundred eight million, six hundred sixty-nine thousand, three hundred ninety-seven".

Divisors: 1 16901 30097 508669397