869657 has 2 divisors, whose sum is σ = 869658. Its totient is φ = 869656.

The previous prime is 869599. The next prime is 869663. The reversal of 869657 is 756968.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 817216 + 52441 = 904^2 + 229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869657 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869657.

It is not a weakly prime, because it can be changed into another prime (869257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434828 + 434829.

It is an arithmetic number, because the mean of its divisors is an integer number (434829).

2⁸⁶⁹⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

869657 is a deficient number, since it is larger than the sum of its proper divisors (1).

869657 is an equidigital number, since it uses as much as digits as its factorization.

869657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 869657 is about 932.5540198830. The cubic root of 869657 is about 95.4514797889.

The spelling of 869657 in words is "eight hundred sixty-nine thousand, six hundred fifty-seven".