161097474 has 32 divisors (see below), whose sum is σ = 355985280. Its totient is φ = 48342272.

The previous prime is 161097463. The next prime is 161097493. The reversal of 161097474 is 474790161.

It is a super-2 number, since 2×161097474² = 51904792258361352, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31989 + ... + 36680.

It is an arithmetic number, because the mean of its divisors is an integer number (11124540).

Almost surely, 2^161097474 is an apocalyptic number.

161097474 is an abundant number, since it is smaller than the sum of its proper divisors (194887806).

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

161097474 is a wasteful number, since it uses less digits than its factorization.

161097474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68714.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 161097474 is about 12692.4179729475. The cubic root of 161097474 is about 544.1219472324.

The spelling of 161097474 in words is "one hundred sixty-one million, ninety-seven thousand, four hundred seventy-four".