72013957 has 2 divisors, whose sum is σ = 72013958. Its totient is φ = 72013956.

The previous prime is 72013939. The next prime is 72013979. The reversal of 72013957 is 75931027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54154881 + 17859076 = 7359^2 + 4226^2 .

It is a cyclic number.

It is not a de Polignac number, because 72013957 - 2¹¹ = 72011909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72013937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36006978 + 36006979.

It is an arithmetic number, because the mean of its divisors is an integer number (36006979).

Almost surely, 2^72013957 is an apocalyptic number.

It is an amenable number.

72013957 is a deficient number, since it is larger than the sum of its proper divisors (1).

72013957 is an equidigital number, since it uses as much as digits as its factorization.

72013957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 72013957 is about 8486.1037584984. The cubic root of 72013957 is about 416.0436441050.

The spelling of 72013957 in words is "seventy-two million, thirteen thousand, nine hundred fifty-seven".