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69885157 = 292409833
BaseRepresentation
bin1000010101001…
…01110011100101
311212111112102011
410022211303211
5120342311112
610533514221
71506004546
oct412456345
9155445364
1069885157
11364a2831
121b4a2971
131162b484
1493d24cd
156206aa7
hex42a5ce5

69885157 has 4 divisors (see below), whose sum is σ = 72295020. Its totient is φ = 67475296.

The previous prime is 69885139. The next prime is 69885223. The reversal of 69885157 is 75158896.

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 40627876 + 29257281 = 6374^2 + 5409^2 .

It is a cyclic number.

It is not a de Polignac number, because 69885157 - 27 = 69885029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69885157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69885457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204888 + ... + 1204945.

It is an arithmetic number, because the mean of its divisors is an integer number (18073755).

Almost surely, 269885157 is an apocalyptic number.

It is an amenable number.

69885157 is a deficient number, since it is larger than the sum of its proper divisors (2409863).

69885157 is a wasteful number, since it uses less digits than its factorization.

69885157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409862.

The product of its digits is 604800, while the sum is 49.

The square root of 69885157 is about 8359.7342661116. The cubic root of 69885157 is about 411.9030252958.

The spelling of 69885157 in words is "sixty-nine million, eight hundred eighty-five thousand, one hundred fifty-seven".

Divisors: 1 29 2409833 69885157