72905803 has 2 divisors, whose sum is σ = 72905804. Its totient is φ = 72905802.

The previous prime is 72905779. The next prime is 72905813. The reversal of 72905803 is 30850927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72905803 - 2⁵ = 72905771 is a prime.

It is a super-2 number, since 2×72905803² = 10630512222149618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72905813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36452901 + 36452902.

It is an arithmetic number, because the mean of its divisors is an integer number (36452902).

Almost surely, 2^72905803 is an apocalyptic number.

72905803 is a deficient number, since it is larger than the sum of its proper divisors (1).

72905803 is an equidigital number, since it uses as much as digits as its factorization.

72905803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 72905803 is about 8538.4895034192. The cubic root of 72905803 is about 417.7540791508.

The spelling of 72905803 in words is "seventy-two million, nine hundred five thousand, eight hundred three".