72920899 has 2 divisors, whose sum is σ = 72920900. Its totient is φ = 72920898.

The previous prime is 72920863. The next prime is 72920909. The reversal of 72920899 is 99802927.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72920899 is a prime.

It is not a weakly prime, because it can be changed into another prime (72920299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36460449 + 36460450.

It is an arithmetic number, because the mean of its divisors is an integer number (36460450).

Almost surely, 2^72920899 is an apocalyptic number.

72920899 is a deficient number, since it is larger than the sum of its proper divisors (1).

72920899 is an equidigital number, since it uses as much as digits as its factorization.

72920899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 72920899 is about 8539.3734547682. The cubic root of 72920899 is about 417.7829107851.

The spelling of 72920899 in words is "seventy-two million, nine hundred twenty thousand, eight hundred ninety-nine".