72544687 has 2 divisors, whose sum is σ = 72544688. Its totient is φ = 72544686.

The previous prime is 72544663. The next prime is 72544709. The reversal of 72544687 is 78644527.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72544687 is a prime.

It is a super-2 number, since 2×72544687² = 10525463223855938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72544607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36272343 + 36272344.

It is an arithmetic number, because the mean of its divisors is an integer number (36272344).

Almost surely, 2^72544687 is an apocalyptic number.

72544687 is a deficient number, since it is larger than the sum of its proper divisors (1).

72544687 is an equidigital number, since it uses as much as digits as its factorization.

72544687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376320, while the sum is 43.

The square root of 72544687 is about 8517.3168897253. The cubic root of 72544687 is about 417.0631993265.

The spelling of 72544687 in words is "seventy-two million, five hundred forty-four thousand, six hundred eighty-seven".