869248609 has 2 divisors, whose sum is σ = 869248610. Its totient is φ = 869248608.

The previous prime is 869248561. The next prime is 869248619. The reversal of 869248609 is 906842968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443734225 + 425514384 = 21065^2 + 20628^2 .

It is a cyclic number.

It is not a de Polignac number, because 869248609 - 2⁷ = 869248481 is a prime.

It is not a weakly prime, because it can be changed into another prime (869248619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434624304 + 434624305.

It is an arithmetic number, because the mean of its divisors is an integer number (434624305).

Almost surely, 2^869248609 is an apocalyptic number.

It is an amenable number.

869248609 is a deficient number, since it is larger than the sum of its proper divisors (1).

869248609 is an equidigital number, since it uses as much as digits as its factorization.

869248609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 869248609 is about 29483.0223857731. The cubic root of 869248609 is about 954.3653610846.

The spelling of 869248609 in words is "eight hundred sixty-nine million, two hundred forty-eight thousand, six hundred nine".