523385972 has 6 divisors (see below), whose sum is σ = 915925458. Its totient is φ = 261692984.

The previous prime is 523385963. The next prime is 523386001. The reversal of 523385972 is 279583325.

It can be written as a sum of positive squares in only one way, i.e., 520022416 + 3363556 = 22804^2 + 1834^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65423243 + ... + 65423250.

It is an arithmetic number, because the mean of its divisors is an integer number (152654243).

Almost surely, 2^523385972 is an apocalyptic number.

It is an amenable number.

523385972 is a deficient number, since it is larger than the sum of its proper divisors (392539486).

523385972 is a wasteful number, since it uses less digits than its factorization.

523385972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130846497 (or 130846495 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 523385972 is about 22877.6303842859. The cubic root of 523385972 is about 805.8867699246.

The spelling of 523385972 in words is "five hundred twenty-three million, three hundred eighty-five thousand, nine hundred seventy-two".