725398769 has 2 divisors, whose sum is σ = 725398770. Its totient is φ = 725398768.

The previous prime is 725398759. The next prime is 725398783. The reversal of 725398769 is 967893527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405418225 + 319980544 = 20135^2 + 17888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725398769 is a prime.

It is a super-2 number, since 2×725398769² = 1052406748133430722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725398759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362699384 + 362699385.

It is an arithmetic number, because the mean of its divisors is an integer number (362699385).

Almost surely, 2^725398769 is an apocalyptic number.

It is an amenable number.

725398769 is a deficient number, since it is larger than the sum of its proper divisors (1).

725398769 is an equidigital number, since it uses as much as digits as its factorization.

725398769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 56.

The square root of 725398769 is about 26933.2279721537. The cubic root of 725398769 is about 898.5155648941.

The spelling of 725398769 in words is "seven hundred twenty-five million, three hundred ninety-eight thousand, seven hundred sixty-nine".