72611239 has 2 divisors, whose sum is σ = 72611240. Its totient is φ = 72611238.

The previous prime is 72611221. The next prime is 72611251. The reversal of 72611239 is 93211627.

It is a strong prime.

It is an emirp because it is prime and its reverse (93211627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72611239 - 2¹¹ = 72609191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72611239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72611339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36305619 + 36305620.

It is an arithmetic number, because the mean of its divisors is an integer number (36305620).

Almost surely, 2^72611239 is an apocalyptic number.

72611239 is a deficient number, since it is larger than the sum of its proper divisors (1).

72611239 is an equidigital number, since it uses as much as digits as its factorization.

72611239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 72611239 is about 8521.2228582522. Note that the first 3 decimals coincide. The cubic root of 72611239 is about 417.1906973220.

The spelling of 72611239 in words is "seventy-two million, six hundred eleven thousand, two hundred thirty-nine".