722715139 has 2 divisors, whose sum is σ = 722715140. Its totient is φ = 722715138.

The previous prime is 722715127. The next prime is 722715157. The reversal of 722715139 is 931517227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 722715139 - 2⁷ = 722715011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 722715098 and 722715107.

It is not a weakly prime, because it can be changed into another prime (722715199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361357569 + 361357570.

It is an arithmetic number, because the mean of its divisors is an integer number (361357570).

Almost surely, 2^722715139 is an apocalyptic number.

722715139 is a deficient number, since it is larger than the sum of its proper divisors (1).

722715139 is an equidigital number, since it uses as much as digits as its factorization.

722715139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 722715139 is about 26883.3617503466. The cubic root of 722715139 is about 897.4061691205.

It can be divided in two parts, 7227 and 15139, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 722715139 in words is "seven hundred twenty-two million, seven hundred fifteen thousand, one hundred thirty-nine".