72480931 has 2 divisors, whose sum is σ = 72480932. Its totient is φ = 72480930.

The previous prime is 72480923. The next prime is 72480937. The reversal of 72480931 is 13908427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72480931 - 2³ = 72480923 is a prime.

It is a super-2 number, since 2×72480931² = 10506970717253522, which contains 22 as substring.

It is equal to p_4255369 and since 72480931 and 4255369 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72480937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36240465 + 36240466.

It is an arithmetic number, because the mean of its divisors is an integer number (36240466).

Almost surely, 2^72480931 is an apocalyptic number.

72480931 is a deficient number, since it is larger than the sum of its proper divisors (1).

72480931 is an equidigital number, since it uses as much as digits as its factorization.

72480931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 72480931 is about 8513.5733390862. The cubic root of 72480931 is about 416.9409846573.

The spelling of 72480931 in words is "seventy-two million, four hundred eighty thousand, nine hundred thirty-one".