72179113 has 2 divisors, whose sum is σ = 72179114. Its totient is φ = 72179112.

The previous prime is 72179071. The next prime is 72179117. The reversal of 72179113 is 31197127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71453209 + 725904 = 8453^2 + 852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72179113 is a prime.

It is not a weakly prime, because it can be changed into another prime (72179117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36089556 + 36089557.

It is an arithmetic number, because the mean of its divisors is an integer number (36089557).

Almost surely, 2^72179113 is an apocalyptic number.

It is an amenable number.

72179113 is a deficient number, since it is larger than the sum of its proper divisors (1).

72179113 is an equidigital number, since it uses as much as digits as its factorization.

72179113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 31.

The square root of 72179113 is about 8495.8291531786. The cubic root of 72179113 is about 416.3614512168.

The spelling of 72179113 in words is "seventy-two million, one hundred seventy-nine thousand, one hundred thirteen".