523672391 has 12 divisors (see below), whose sum is σ = 578151000. Its totient is φ = 473961840.

The previous prime is 523672337. The next prime is 523672411. The reversal of 523672391 is 193276325.

It is not a de Polignac number, because 523672391 - 2²² = 519478087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523672991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18260 + ... + 37158.

It is an arithmetic number, because the mean of its divisors is an integer number (48179250).

Almost surely, 2^523672391 is an apocalyptic number.

523672391 is a deficient number, since it is larger than the sum of its proper divisors (54478609).

523672391 is a wasteful number, since it uses less digits than its factorization.

523672391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19150 (or 19139 counting only the distinct ones).

The product of its digits is 68040, while the sum is 38.

The square root of 523672391 is about 22883.8893328909. The cubic root of 523672391 is about 806.0337482559.

The spelling of 523672391 in words is "five hundred twenty-three million, six hundred seventy-two thousand, three hundred ninety-one".