161982996 has 24 divisors (see below), whose sum is σ = 431954880. Its totient is φ = 46280832.

The previous prime is 161982991. The next prime is 161983001. The reversal of 161982996 is 699289161.

It is an interprime number because it is at equal distance from previous prime (161982991) and next prime (161983001).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161982991) by changing a digit.

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, 964101 + ... + 964268.

It is an arithmetic number, because the mean of its divisors is an integer number (17998120).

Almost surely, 2^161982996 is an apocalyptic number.

It is an amenable number.

161982996 is an abundant number, since it is smaller than the sum of its proper divisors (269971884).

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

161982996 is a wasteful number, since it uses less digits than its factorization.

161982996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928383 (or 1928381 counting only the distinct ones).

The product of its digits is 419904, while the sum is 51.

The square root of 161982996 is about 12727.2540636227. The cubic root of 161982996 is about 545.1171041461.

The spelling of 161982996 in words is "one hundred sixty-one million, nine hundred eighty-two thousand, nine hundred ninety-six".