72479537 has 6 divisors (see below), whose sum is σ = 78483942. Its totient is φ = 66904032.

The previous prime is 72479531. The next prime is 72479557. The reversal of 72479537 is 73597427.

It can be written as a sum of positive squares in 3 ways, for example, as 1852321 + 70627216 = 1361^2 + 8404^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72479537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72479531) 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 in 5 ways as a sum of consecutive naturals, for example, 214268 + ... + 214605.

It is an arithmetic number, because the mean of its divisors is an integer number (13080657).

Almost surely, 2^72479537 is an apocalyptic number.

It is an amenable number.

72479537 is a deficient number, since it is larger than the sum of its proper divisors (6004405).

72479537 is a wasteful number, since it uses less digits than its factorization.

72479537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428899 (or 428886 counting only the distinct ones).

The product of its digits is 370440, while the sum is 44.

The square root of 72479537 is about 8513.4914694266. The cubic root of 72479537 is about 416.9383116809.

The spelling of 72479537 in words is "seventy-two million, four hundred seventy-nine thousand, five hundred thirty-seven".