163987572 has 48 divisors (see below), whose sum is σ = 438394880. Its totient is φ = 46736352.

The previous prime is 163987553. The next prime is 163987591. The reversal of 163987572 is 275789361.

It is an interprime number because it is at equal distance from previous prime (163987553) and next prime (163987591).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34653 + ... + 39099.

Almost surely, 2^163987572 is an apocalyptic number.

163987572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

163987572 is an abundant number, since it is smaller than the sum of its proper divisors (274407308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163987572 is a wasteful number, since it uses less digits than its factorization.

163987572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4900 (or 4898 counting only the distinct ones).

The product of its digits is 635040, while the sum is 48.

The square root of 163987572 is about 12805.7632337944. The cubic root of 163987572 is about 547.3565404661.

The spelling of 163987572 in words is "one hundred sixty-three million, nine hundred eighty-seven thousand, five hundred seventy-two".