72500111 has 2 divisors, whose sum is σ = 72500112. Its totient is φ = 72500110.

The previous prime is 72500101. The next prime is 72500149. The reversal of 72500111 is 11100527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72500111 - 2²⁶ = 5391247 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72500111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72500101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36250055 + 36250056.

It is an arithmetic number, because the mean of its divisors is an integer number (36250056).

Almost surely, 2^72500111 is an apocalyptic number.

72500111 is a deficient number, since it is larger than the sum of its proper divisors (1).

72500111 is an equidigital number, since it uses as much as digits as its factorization.

72500111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 72500111 is about 8514.6997011051. The cubic root of 72500111 is about 416.9777585724.

Adding to 72500111 its reverse (11100527), we get a palindrome (83600638).

The spelling of 72500111 in words is "seventy-two million, five hundred thousand, one hundred eleven".