69685897 has 2 divisors, whose sum is σ = 69685898. Its totient is φ = 69685896.

The previous prime is 69685841. The next prime is 69685909. The reversal of 69685897 is 79858696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69039481 + 646416 = 8309^2 + 804^2 .

It is a cyclic number.

It is not a de Polignac number, because 69685897 - 2⁷ = 69685769 is a prime.

It is a super-2 number, since 2×69685897² = 9712248481389218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69685817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34842948 + 34842949.

It is an arithmetic number, because the mean of its divisors is an integer number (34842949).

Almost surely, 2^69685897 is an apocalyptic number.

It is an amenable number.

69685897 is a deficient number, since it is larger than the sum of its proper divisors (1).

69685897 is an equidigital number, since it uses as much as digits as its factorization.

69685897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 58.

The square root of 69685897 is about 8347.8079158543. The cubic root of 69685897 is about 411.5111732425.

The spelling of 69685897 in words is "sixty-nine million, six hundred eighty-five thousand, eight hundred ninety-seven".