523697939 has 4 divisors (see below), whose sum is σ = 525280440. Its totient is φ = 522115440.

The previous prime is 523697897. The next prime is 523697953. The reversal of 523697939 is 939796325.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 523697939 - 2⁸ = 523697683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523697959) 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, 790754 + ... + 791415.

It is an arithmetic number, because the mean of its divisors is an integer number (131320110).

Almost surely, 2^523697939 is an apocalyptic number.

523697939 is a deficient number, since it is larger than the sum of its proper divisors (1582501).

523697939 is a wasteful number, since it uses less digits than its factorization.

523697939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582500.

The product of its digits is 2755620, while the sum is 53.

The square root of 523697939 is about 22884.4475353896. The cubic root of 523697939 is about 806.0468558245.

The spelling of 523697939 in words is "five hundred twenty-three million, six hundred ninety-seven thousand, nine hundred thirty-nine".