869515223 has 2 divisors, whose sum is σ = 869515224. Its totient is φ = 869515222.

The previous prime is 869515211. The next prime is 869515237. The reversal of 869515223 is 322515968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 869515223 - 2²⁰ = 868466647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869515123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434757611 + 434757612.

It is an arithmetic number, because the mean of its divisors is an integer number (434757612).

Almost surely, 2^869515223 is an apocalyptic number.

869515223 is a deficient number, since it is larger than the sum of its proper divisors (1).

869515223 is an equidigital number, since it uses as much as digits as its factorization.

869515223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 869515223 is about 29487.5435226470. The cubic root of 869515223 is about 954.4629247174.

The spelling of 869515223 in words is "eight hundred sixty-nine million, five hundred fifteen thousand, two hundred twenty-three".