72531783 has 6 divisors (see below), whose sum is σ = 104768144. Its totient is φ = 48354516.

The previous prime is 72531779. The next prime is 72531787. The reversal of 72531783 is 38713527.

It is an interprime number because it is at equal distance from previous prime (72531779) and next prime (72531787).

It is not a de Polignac number, because 72531783 - 2² = 72531779 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 (72531787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4029535 + ... + 4029552.

Almost surely, 2^72531783 is an apocalyptic number.

72531783 is a deficient number, since it is larger than the sum of its proper divisors (32236361).

72531783 is a wasteful number, since it uses less digits than its factorization.

72531783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8059093 (or 8059090 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 72531783 is about 8516.5593404849. The cubic root of 72531783 is about 417.0384692699.

The spelling of 72531783 in words is "seventy-two million, five hundred thirty-one thousand, seven hundred eighty-three".