161390946 has 16 divisors (see below), whose sum is σ = 324314208. Its totient is φ = 53541600.

The previous prime is 161390941. The next prime is 161390947. The reversal of 161390946 is 649093161.

It is not an unprimeable number, because it can be changed into a prime (161390941) 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, 62475 + ... + 65006.

It is an arithmetic number, because the mean of its divisors is an integer number (20269638).

Almost surely, 2^161390946 is an apocalyptic number.

161390946 is an abundant number, since it is smaller than the sum of its proper divisors (162923262).

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

161390946 is a wasteful number, since it uses less digits than its factorization.

161390946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127697.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 161390946 is about 12703.9736303253. The cubic root of 161390946 is about 544.4521566063.

The spelling of 161390946 in words is "one hundred sixty-one million, three hundred ninety thousand, nine hundred forty-six".