72345113 has 2 divisors, whose sum is σ = 72345114. Its totient is φ = 72345112.

The previous prime is 72345109. The next prime is 72345181. The reversal of 72345113 is 31154327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62932489 + 9412624 = 7933^2 + 3068^2 .

It is an emirp because it is prime and its reverse (31154327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72345113 - 2² = 72345109 is a prime.

It is not a weakly prime, because it can be changed into another prime (72345913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36172556 + 36172557.

It is an arithmetic number, because the mean of its divisors is an integer number (36172557).

Almost surely, 2^72345113 is an apocalyptic number.

It is an amenable number.

72345113 is a deficient number, since it is larger than the sum of its proper divisors (1).

72345113 is an equidigital number, since it uses as much as digits as its factorization.

72345113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 72345113 is about 8505.5930422282. The cubic root of 72345113 is about 416.6803942855.

The spelling of 72345113 in words is "seventy-two million, three hundred forty-five thousand, one hundred thirteen".