72324491 has 2 divisors, whose sum is σ = 72324492. Its totient is φ = 72324490.

The previous prime is 72324449. The next prime is 72324503. The reversal of 72324491 is 19442327.

It is a strong prime.

It is an emirp because it is prime and its reverse (19442327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72324491 - 2²² = 68130187 is a prime.

It is not a weakly prime, because it can be changed into another prime (72324401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36162245 + 36162246.

It is an arithmetic number, because the mean of its divisors is an integer number (36162246).

Almost surely, 2^72324491 is an apocalyptic number.

72324491 is a deficient number, since it is larger than the sum of its proper divisors (1).

72324491 is an equidigital number, since it uses as much as digits as its factorization.

72324491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 72324491 is about 8504.3806946773. The cubic root of 72324491 is about 416.6407988919.

The spelling of 72324491 in words is "seventy-two million, three hundred twenty-four thousand, four hundred ninety-one".