869115887 has 2 divisors, whose sum is σ = 869115888. Its totient is φ = 869115886.

The previous prime is 869115857. The next prime is 869115911. The reversal of 869115887 is 788511968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 869115887 - 2⁶ = 869115823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869115847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434557943 + 434557944.

It is an arithmetic number, because the mean of its divisors is an integer number (434557944).

Almost surely, 2^869115887 is an apocalyptic number.

869115887 is a deficient number, since it is larger than the sum of its proper divisors (1).

869115887 is an equidigital number, since it uses as much as digits as its factorization.

869115887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 53.

The square root of 869115887 is about 29480.7714790505. The cubic root of 869115887 is about 954.3167859031.

The spelling of 869115887 in words is "eight hundred sixty-nine million, one hundred fifteen thousand, eight hundred eighty-seven".