409687725 has 24 divisors (see below), whose sum is σ = 679019040. Its totient is φ = 217961920.

The previous prime is 409687711. The next prime is 409687739. The reversal of 409687725 is 527786904.

It is an interprime number because it is at equal distance from previous prime (409687711) and next prime (409687739).

It is not a de Polignac number, because 409687725 - 2⁵ = 409687693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24907 + ... + 37943.

It is an arithmetic number, because the mean of its divisors is an integer number (28292460).

Almost surely, 2^409687725 is an apocalyptic number.

It is an amenable number.

409687725 is a deficient number, since it is larger than the sum of its proper divisors (269331315).

409687725 is a wasteful number, since it uses less digits than its factorization.

409687725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13469 (or 13464 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 409687725 is about 20240.7441809831. The cubic root of 409687725 is about 742.7072282628.

The spelling of 409687725 in words is "four hundred nine million, six hundred eighty-seven thousand, seven hundred twenty-five".