72296891 has 2 divisors, whose sum is σ = 72296892. Its totient is φ = 72296890.

The previous prime is 72296879. The next prime is 72296923. The reversal of 72296891 is 19869227.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72296891 - 2⁶ = 72296827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72296831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36148445 + 36148446.

It is an arithmetic number, because the mean of its divisors is an integer number (36148446).

Almost surely, 2^72296891 is an apocalyptic number.

72296891 is a deficient number, since it is larger than the sum of its proper divisors (1).

72296891 is an equidigital number, since it uses as much as digits as its factorization.

72296891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 72296891 is about 8502.7578467224. The cubic root of 72296891 is about 416.5877935684.

The spelling of 72296891 in words is "seventy-two million, two hundred ninety-six thousand, eight hundred ninety-one".