72841637 has 8 divisors (see below), whose sum is σ = 80121792. Its totient is φ = 66218460.

The previous prime is 72841619. The next prime is 72841697. The reversal of 72841637 is 73614827.

It is not a de Polignac number, because 72841637 - 2¹⁰ = 72840613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72841637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72841607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26033 + ... + 28694.

It is an arithmetic number, because the mean of its divisors is an integer number (10015224).

Almost surely, 2^72841637 is an apocalyptic number.

It is an amenable number.

72841637 is a deficient number, since it is larger than the sum of its proper divisors (7280155).

72841637 is an equidigital number, since it uses as much as digits as its factorization.

72841637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54760 (or 54738 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 72841637 is about 8534.7312201381. The cubic root of 72841637 is about 417.6314849948.

The spelling of 72841637 in words is "seventy-two million, eight hundred forty-one thousand, six hundred thirty-seven".