72442793 has 2 divisors, whose sum is σ = 72442794. Its totient is φ = 72442792.

The previous prime is 72442771. The next prime is 72442813. The reversal of 72442793 is 39724427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38477209 + 33965584 = 6203^2 + 5828^2 .

It is a cyclic number.

It is not a de Polignac number, because 72442793 - 2⁸ = 72442537 is a prime.

It is not a weakly prime, because it can be changed into another prime (72442093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36221396 + 36221397.

It is an arithmetic number, because the mean of its divisors is an integer number (36221397).

Almost surely, 2^72442793 is an apocalyptic number.

It is an amenable number.

72442793 is a deficient number, since it is larger than the sum of its proper divisors (1).

72442793 is an equidigital number, since it uses as much as digits as its factorization.

72442793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 38.

The square root of 72442793 is about 8511.3332093157. Note that the first 3 decimals coincide. The cubic root of 72442793 is about 416.8678431894.

The spelling of 72442793 in words is "seventy-two million, four hundred forty-two thousand, seven hundred ninety-three".