839975069 has 4 divisors (see below), whose sum is σ = 843074880. Its totient is φ = 836875260.

The previous prime is 839975057. The next prime is 839975093. The reversal of 839975069 is 960579938.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 839975069 - 2²⁸ = 571539613 is a prime.

It is a super-2 number, since 2×839975069² = 1411116233083109522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839977069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1549499 + ... + 1550040.

It is an arithmetic number, because the mean of its divisors is an integer number (210768720).

Almost surely, 2^839975069 is an apocalyptic number.

It is an amenable number.

839975069 is a deficient number, since it is larger than the sum of its proper divisors (3099811).

839975069 is a wasteful number, since it uses less digits than its factorization.

839975069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099810.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The square root of 839975069 is about 28982.3233885760. The cubic root of 839975069 is about 943.5294613020.

The spelling of 839975069 in words is "eight hundred thirty-nine million, nine hundred seventy-five thousand, sixty-nine".