72357139 has 2 divisors, whose sum is σ = 72357140. Its totient is φ = 72357138.

The previous prime is 72357121. The next prime is 72357161. The reversal of 72357139 is 93175327.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72357139 is a prime.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 72357098 and 72357107.

It is not a weakly prime, because it can be changed into another prime (72357179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36178569 + 36178570.

It is an arithmetic number, because the mean of its divisors is an integer number (36178570).

Almost surely, 2^72357139 is an apocalyptic number.

72357139 is a deficient number, since it is larger than the sum of its proper divisors (1).

72357139 is an equidigital number, since it uses as much as digits as its factorization.

72357139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 37.

The square root of 72357139 is about 8506.2999594418. The cubic root of 72357139 is about 416.7034814049.

The spelling of 72357139 in words is "seventy-two million, three hundred fifty-seven thousand, one hundred thirty-nine".