72631413 has 6 divisors (see below), whose sum is σ = 104912054. Its totient is φ = 48420936.

The previous prime is 72631411. The next prime is 72631421. The reversal of 72631413 is 31413627.

It can be written as a sum of positive squares in only one way, i.e., 47651409 + 24980004 = 6903^2 + 4998^2 .

It is not a de Polignac number, because 72631413 - 2¹ = 72631411 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 (72631411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4035070 + ... + 4035087.

Almost surely, 2^72631413 is an apocalyptic number.

It is an amenable number.

72631413 is a deficient number, since it is larger than the sum of its proper divisors (32280641).

72631413 is a wasteful number, since it uses less digits than its factorization.

72631413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8070163 (or 8070160 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 72631413 is about 8522.4065263281. The cubic root of 72631413 is about 417.2293305781.

The spelling of 72631413 in words is "seventy-two million, six hundred thirty-one thousand, four hundred thirteen".