163289725 has 12 divisors (see below), whose sum is σ = 203240340. Its totient is φ = 130140800.

The previous prime is 163289713. The next prime is 163289759. The reversal of 163289725 is 527982361.

It can be written as a sum of positive squares in 6 ways, for example, as 2152089 + 161137636 = 1467^2 + 12694^2 .

It is not a de Polignac number, because 163289725 - 2¹³ = 163281533 is a prime.

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, 5416 + ... + 18865.

It is an arithmetic number, because the mean of its divisors is an integer number (16936695).

Almost surely, 2^163289725 is an apocalyptic number.

It is an amenable number.

163289725 is a deficient number, since it is larger than the sum of its proper divisors (39950615).

163289725 is a wasteful number, since it uses less digits than its factorization.

163289725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24560 (or 24555 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 163289725 is about 12778.4868039999. The cubic root of 163289725 is about 546.5790136002.

The spelling of 163289725 in words is "one hundred sixty-three million, two hundred eighty-nine thousand, seven hundred twenty-five".