72637747 has 12 divisors (see below), whose sum is σ = 90997536. Its totient is φ = 57471120.

The previous prime is 72637729. The next prime is 72637751. The reversal of 72637747 is 74773627.

It is not a de Polignac number, because 72637747 - 2¹⁵ = 72604979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72638747) 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 11 ways as a sum of consecutive naturals, for example, 56379 + ... + 57652.

It is an arithmetic number, because the mean of its divisors is an integer number (7583128).

Almost surely, 2^72637747 is an apocalyptic number.

72637747 is a deficient number, since it is larger than the sum of its proper divisors (18359789).

72637747 is a wasteful number, since it uses less digits than its factorization.

72637747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114058 (or 114051 counting only the distinct ones).

The product of its digits is 345744, while the sum is 43.

The square root of 72637747 is about 8522.7781268786. The cubic root of 72637747 is about 417.2414587270.

The spelling of 72637747 in words is "seventy-two million, six hundred thirty-seven thousand, seven hundred forty-seven".