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64319117 = 421152777
BaseRepresentation
bin1111010101011…
…0111010001101
311111000202020112
43311112322031
5112431202432
610214325405
71410463202
oct365267215
9144022215
1064319117
11333409a5
1219659865
131042cb65
148783ca9
1559a77b2
hex3d56e8d

64319117 has 4 divisors (see below), whose sum is σ = 64472316. Its totient is φ = 64165920.

The previous prime is 64319111. The next prime is 64319131. The reversal of 64319117 is 71191346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7678441 + 56640676 = 2771^2 + 7526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-64319117 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 (64319111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75968 + ... + 76809.

It is an arithmetic number, because the mean of its divisors is an integer number (16118079).

Almost surely, 264319117 is an apocalyptic number.

It is an amenable number.

64319117 is a deficient number, since it is larger than the sum of its proper divisors (153199).

64319117 is a wasteful number, since it uses less digits than its factorization.

64319117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153198.

The product of its digits is 4536, while the sum is 32.

The square root of 64319117 is about 8019.9200120699. The cubic root of 64319117 is about 400.6637251465.

The spelling of 64319117 in words is "sixty-four million, three hundred nineteen thousand, one hundred seventeen".

Divisors: 1 421 152777 64319117