161309942 has 16 divisors (see below), whose sum is σ = 250736640. Its totient is φ = 77778792.

The previous prime is 161309927. The next prime is 161309963. The reversal of 161309942 is 249903161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5078 + ... + 18665.

It is an arithmetic number, because the mean of its divisors is an integer number (15671040).

Almost surely, 2^161309942 is an apocalyptic number.

161309942 is a deficient number, since it is larger than the sum of its proper divisors (89426698).

161309942 is a wasteful number, since it uses less digits than its factorization.

161309942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23867.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 161309942 is about 12700.7850938436. The cubic root of 161309942 is about 544.3610523979.

The spelling of 161309942 in words is "one hundred sixty-one million, three hundred nine thousand, nine hundred forty-two".