72961223 has 2 divisors, whose sum is σ = 72961224. Its totient is φ = 72961222.

The previous prime is 72961211. The next prime is 72961243. The reversal of 72961223 is 32216927.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72961223 - 2¹⁶ = 72895687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72961223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72961243) 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, 36480611 + 36480612.

It is an arithmetic number, because the mean of its divisors is an integer number (36480612).

Almost surely, 2^72961223 is an apocalyptic number.

72961223 is a deficient number, since it is larger than the sum of its proper divisors (1).

72961223 is an equidigital number, since it uses as much as digits as its factorization.

72961223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 72961223 is about 8541.7341916030. The cubic root of 72961223 is about 417.8599055103.

The spelling of 72961223 in words is "seventy-two million, nine hundred sixty-one thousand, two hundred twenty-three".