69990879 has 16 divisors (see below), whose sum is σ = 107712000. Its totient is φ = 39597600.

The previous prime is 69990857. The next prime is 69990881. The reversal of 69990879 is 97809996.

It is not a de Polignac number, because 69990879 - 2⁵ = 69990847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69998879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14379 + ... + 18620.

It is an arithmetic number, because the mean of its divisors is an integer number (6732000).

Almost surely, 2^69990879 is an apocalyptic number.

69990879 is a deficient number, since it is larger than the sum of its proper divisors (37721121).

69990879 is a wasteful number, since it uses less digits than its factorization.

69990879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33110.

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 69990879 is about 8366.0551635762. The cubic root of 69990879 is about 412.1106290875.

The spelling of 69990879 in words is "sixty-nine million, nine hundred ninety thousand, eight hundred seventy-nine".