72599531 has 2 divisors, whose sum is σ = 72599532. Its totient is φ = 72599530.

The previous prime is 72599497. The next prime is 72599533. The reversal of 72599531 is 13599527.

It is a strong prime.

It is an emirp because it is prime and its reverse (13599527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72599531 - 2⁶ = 72599467 is a prime.

It is a super-2 number, since 2×72599531² = 10541383802839922, which contains 22 as substring.

Together with 72599533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72599533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36299765 + 36299766.

It is an arithmetic number, because the mean of its divisors is an integer number (36299766).

Almost surely, 2^72599531 is an apocalyptic number.

72599531 is a deficient number, since it is larger than the sum of its proper divisors (1).

72599531 is an equidigital number, since it uses as much as digits as its factorization.

72599531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85050, while the sum is 41.

The square root of 72599531 is about 8520.5358399575. The cubic root of 72599531 is about 417.1682731936.

The spelling of 72599531 in words is "seventy-two million, five hundred ninety-nine thousand, five hundred thirty-one".