72673637 has 4 divisors (see below), whose sum is σ = 72700320. Its totient is φ = 72646956.

The previous prime is 72673621. The next prime is 72673639. The reversal of 72673637 is 73637627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72673637 - 2⁴ = 72673621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72673594 and 72673603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72673639) 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 3 ways as a sum of consecutive naturals, for example, 8723 + ... + 14880.

It is an arithmetic number, because the mean of its divisors is an integer number (18175080).

Almost surely, 2^72673637 is an apocalyptic number.

It is an amenable number.

72673637 is a deficient number, since it is larger than the sum of its proper divisors (26683).

72673637 is a wasteful number, since it uses less digits than its factorization.

72673637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26682.

The product of its digits is 222264, while the sum is 41.

The square root of 72673637 is about 8524.8834009622. The cubic root of 72673637 is about 417.3101664853.

The spelling of 72673637 in words is "seventy-two million, six hundred seventy-three thousand, six hundred thirty-seven".