722516129 has 2 divisors, whose sum is σ = 722516130. Its totient is φ = 722516128.

The previous prime is 722516111. The next prime is 722516153. The reversal of 722516129 is 921615227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611424529 + 111091600 = 24727^2 + 10540^2 .

It is a cyclic number.

It is not a de Polignac number, because 722516129 - 2¹⁶ = 722450593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (722516159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361258064 + 361258065.

It is an arithmetic number, because the mean of its divisors is an integer number (361258065).

Almost surely, 2^722516129 is an apocalyptic number.

It is an amenable number.

722516129 is a deficient number, since it is larger than the sum of its proper divisors (1).

722516129 is an equidigital number, since it uses as much as digits as its factorization.

722516129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 722516129 is about 26879.6601355002. The cubic root of 722516129 is about 897.3237903301.

It can be divided in two parts, 7225 and 16129, that multiplied together give a square (116532025 = 10795²).

The spelling of 722516129 in words is "seven hundred twenty-two million, five hundred sixteen thousand, one hundred twenty-nine".