161873886 has 8 divisors (see below), whose sum is σ = 323747784. Its totient is φ = 53957960.

The previous prime is 161873879. The next prime is 161873893. The reversal of 161873886 is 688378161.

It is an interprime number because it is at equal distance from previous prime (161873879) and next prime (161873893).

It is a sphenic number, since it is the product of 3 distinct primes.

161873886 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13489485 + ... + 13489496.

It is an arithmetic number, because the mean of its divisors is an integer number (40468473).

Almost surely, 2^161873886 is an apocalyptic number.

161873886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161873886 is a wasteful number, since it uses less digits than its factorization.

161873886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26978986.

The product of its digits is 387072, while the sum is 48.

The square root of 161873886 is about 12722.9668709779. The cubic root of 161873886 is about 544.9946816528.

The spelling of 161873886 in words is "one hundred sixty-one million, eight hundred seventy-three thousand, eight hundred eighty-six".