72901111 has 2 divisors, whose sum is σ = 72901112. Its totient is φ = 72901110.

The previous prime is 72901091. The next prime is 72901123. The reversal of 72901111 is 11110927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72901111 - 2⁵ = 72901079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72901511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36450555 + 36450556.

It is an arithmetic number, because the mean of its divisors is an integer number (36450556).

Almost surely, 2^72901111 is an apocalyptic number.

72901111 is a deficient number, since it is larger than the sum of its proper divisors (1).

72901111 is an equidigital number, since it uses as much as digits as its factorization.

72901111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 72901111 is about 8538.2147431416. The cubic root of 72901111 is about 417.7451171564.

The spelling of 72901111 in words is "seventy-two million, nine hundred one thousand, one hundred eleven".