725689389 has 8 divisors (see below), whose sum is σ = 969791680. Its totient is φ = 482690016.

The previous prime is 725689373. The next prime is 725689403. The reversal of 725689389 is 983986527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 725689389 - 2⁴ = 725689373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725689189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274192 + ... + 276825.

It is an arithmetic number, because the mean of its divisors is an integer number (121223960).

Almost surely, 2^725689389 is an apocalyptic number.

It is an amenable number.

725689389 is a deficient number, since it is larger than the sum of its proper divisors (244102291).

725689389 is a wasteful number, since it uses less digits than its factorization.

725689389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551459.

The product of its digits is 6531840, while the sum is 57.

The square root of 725689389 is about 26938.6226262591. The cubic root of 725689389 is about 898.6355410783.

The spelling of 725689389 in words is "seven hundred twenty-five million, six hundred eighty-nine thousand, three hundred eighty-nine".