72431113 has 2 divisors, whose sum is σ = 72431114. Its totient is φ = 72431112.

The previous prime is 72431063. The next prime is 72431119. The reversal of 72431113 is 31113427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67108864 + 5322249 = 8192^2 + 2307^2 .

It is a cyclic number.

It is not a de Polignac number, because 72431113 - 2²⁵ = 38876681 is a prime.

It is a super-2 number, since 2×72431113² = 10492532260837538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72431119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36215556 + 36215557.

It is an arithmetic number, because the mean of its divisors is an integer number (36215557).

Almost surely, 2^72431113 is an apocalyptic number.

It is an amenable number.

72431113 is a deficient number, since it is larger than the sum of its proper divisors (1).

72431113 is an equidigital number, since it uses as much as digits as its factorization.

72431113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 72431113 is about 8510.6470376817. The cubic root of 72431113 is about 416.8454380247.

The spelling of 72431113 in words is "seventy-two million, four hundred thirty-one thousand, one hundred thirteen".