725079989 has 2 divisors, whose sum is σ = 725079990. Its totient is φ = 725079988.

The previous prime is 725079983. The next prime is 725080001. The reversal of 725079989 is 989970527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723072100 + 2007889 = 26890^2 + 1417^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725079989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725079983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362539994 + 362539995.

It is an arithmetic number, because the mean of its divisors is an integer number (362539995).

Almost surely, 2^725079989 is an apocalyptic number.

It is an amenable number.

725079989 is a deficient number, since it is larger than the sum of its proper divisors (1).

725079989 is an equidigital number, since it uses as much as digits as its factorization.

725079989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The square root of 725079989 is about 26927.3093531456. The cubic root of 725079989 is about 898.3839266045.

The spelling of 725079989 in words is "seven hundred twenty-five million, seventy-nine thousand, nine hundred eighty-nine".