72621487 has 4 divisors (see below), whose sum is σ = 73102576. Its totient is φ = 72140400.

The previous prime is 72621473. The next prime is 72621509. The reversal of 72621487 is 78412627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72621487 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 (72621407) 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, 240318 + ... + 240619.

It is an arithmetic number, because the mean of its divisors is an integer number (18275644).

Almost surely, 2^72621487 is an apocalyptic number.

72621487 is a deficient number, since it is larger than the sum of its proper divisors (481089).

72621487 is a wasteful number, since it uses less digits than its factorization.

72621487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481088.

The product of its digits is 37632, while the sum is 37.

The square root of 72621487 is about 8521.8241591809. The cubic root of 72621487 is about 417.2103231595.

The spelling of 72621487 in words is "seventy-two million, six hundred twenty-one thousand, four hundred eighty-seven".