725398669 has 8 divisors (see below), whose sum is σ = 734735232. Its totient is φ = 716076480.

The previous prime is 725398627. The next prime is 725398717. The reversal of 725398669 is 966893527.

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

It is a cyclic number.

It is not a de Polignac number, because 725398669 - 2¹⁷ = 725267597 is a prime.

It is a super-2 number, since 2×725398669² = 1052406457973943122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725398769) 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, 128629 + ... + 134149.

It is an arithmetic number, because the mean of its divisors is an integer number (91841904).

Almost surely, 2^725398669 is an apocalyptic number.

It is an amenable number.

725398669 is a deficient number, since it is larger than the sum of its proper divisors (9336563).

725398669 is a wasteful number, since it uses less digits than its factorization.

725398669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7187.

The product of its digits is 4898880, while the sum is 55.

The square root of 725398669 is about 26933.2261157107. The cubic root of 725398669 is about 898.5155236057.

The spelling of 725398669 in words is "seven hundred twenty-five million, three hundred ninety-eight thousand, six hundred sixty-nine".