163987842 has 32 divisors (see below), whose sum is σ = 332506944. Its totient is φ = 53912000.

The previous prime is 163987787. The next prime is 163987843. The reversal of 163987842 is 248789361.

It is a junction number, because it is equal to n+sod(n) for n = 163987791 and 163987800.

It is not an unprimeable number, because it can be changed into a prime (163987843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279073 + ... + 279659.

It is an arithmetic number, because the mean of its divisors is an integer number (10390842).

Almost surely, 2^163987842 is an apocalyptic number.

163987842 is an abundant number, since it is smaller than the sum of its proper divisors (168519102).

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

163987842 is a wasteful number, since it uses less digits than its factorization.

163987842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its digits is 580608, while the sum is 48.

The square root of 163987842 is about 12805.7737759184. The cubic root of 163987842 is about 547.3568408673.

The spelling of 163987842 in words is "one hundred sixty-three million, nine hundred eighty-seven thousand, eight hundred forty-two".