72680637 has 4 divisors (see below), whose sum is σ = 96907520. Its totient is φ = 48453756.

The previous prime is 72680591. The next prime is 72680653. The reversal of 72680637 is 73608627.

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 not a de Polignac number, because 72680637 - 2¹⁰ = 72679613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72680595 and 72680604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72680677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12113437 + ... + 12113442.

It is an arithmetic number, because the mean of its divisors is an integer number (24226880).

Almost surely, 2^72680637 is an apocalyptic number.

It is an amenable number.

72680637 is a deficient number, since it is larger than the sum of its proper divisors (24226883).

72680637 is a wasteful number, since it uses less digits than its factorization.

72680637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24226882.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 72680637 is about 8525.2939538763. The cubic root of 72680637 is about 417.3235646377.

The spelling of 72680637 in words is "seventy-two million, six hundred eighty thousand, six hundred thirty-seven".