879404969 has 2 divisors, whose sum is σ = 879404970. Its totient is φ = 879404968.

The previous prime is 879404959. The next prime is 879404989. The reversal of 879404969 is 969404978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446265625 + 433139344 = 21125^2 + 20812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-879404969 is a prime.

It is a super-2 number, since 2×879404969² = 1546706199003781922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (879404959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439702484 + 439702485.

It is an arithmetic number, because the mean of its divisors is an integer number (439702485).

Almost surely, 2^879404969 is an apocalyptic number.

It is an amenable number.

879404969 is a deficient number, since it is larger than the sum of its proper divisors (1).

879404969 is an equidigital number, since it uses as much as digits as its factorization.

879404969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 879404969 is about 29654.7630069775. The cubic root of 879404969 is about 958.0679345801.

Subtracting 879404969 from its reverse (969404978), we obtain a palindrome (90000009).

The spelling of 879404969 in words is "eight hundred seventy-nine million, four hundred four thousand, nine hundred sixty-nine".