163403725 has 12 divisors (see below), whose sum is σ = 206933184. Its totient is φ = 127940720.

The previous prime is 163403701. The next prime is 163403771. The reversal of 163403725 is 527304361.

It is not a de Polignac number, because 163403725 - 2⁵ = 163403693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68359 + ... + 70708.

It is an arithmetic number, because the mean of its divisors is an integer number (17244432).

Almost surely, 2^163403725 is an apocalyptic number.

It is an amenable number.

163403725 is a deficient number, since it is larger than the sum of its proper divisors (43529459).

163403725 is a wasteful number, since it uses less digits than its factorization.

163403725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139124 (or 139119 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 163403725 is about 12782.9466477804. The cubic root of 163403725 is about 546.7061812520.

The spelling of 163403725 in words is "one hundred sixty-three million, four hundred three thousand, seven hundred twenty-five".