161942984 has 32 divisors (see below), whose sum is σ = 353574720. Its totient is φ = 68093376.

The previous prime is 161942971. The next prime is 161942999. The reversal of 161942984 is 489249161.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24314 + ... + 30249.

It is an arithmetic number, because the mean of its divisors is an integer number (11049210).

Almost surely, 2^161942984 is an apocalyptic number.

161942984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161942984 is an abundant number, since it is smaller than the sum of its proper divisors (191631736).

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

161942984 is a wasteful number, since it uses less digits than its factorization.

161942984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54629 (or 54625 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 161942984 is about 12725.6820642353. The cubic root of 161942984 is about 545.0722166739.

The spelling of 161942984 in words is "one hundred sixty-one million, nine hundred forty-two thousand, nine hundred eighty-four".