72327491 has 2 divisors, whose sum is σ = 72327492. Its totient is φ = 72327490.

The previous prime is 72327467. The next prime is 72327511. The reversal of 72327491 is 19472327.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72327491 - 2⁶ = 72327427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72327191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36163745 + 36163746.

It is an arithmetic number, because the mean of its divisors is an integer number (36163746).

Almost surely, 2^72327491 is an apocalyptic number.

72327491 is a deficient number, since it is larger than the sum of its proper divisors (1).

72327491 is an equidigital number, since it uses as much as digits as its factorization.

72327491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 72327491 is about 8504.5570725347. The cubic root of 72327491 is about 416.6465595275.

The spelling of 72327491 in words is "seventy-two million, three hundred twenty-seven thousand, four hundred ninety-one".