161917274 has 16 divisors (see below), whose sum is σ = 249983712. Its totient is φ = 78611568.

The previous prime is 161917271. The next prime is 161917277. The reversal of 161917274 is 472719161.

161917274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161917271) and next prime (161917277).

It is not an unprimeable number, because it can be changed into a prime (161917271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9437 + ... + 20319.

It is an arithmetic number, because the mean of its divisors is an integer number (15623982).

Almost surely, 2^161917274 is an apocalyptic number.

161917274 is a deficient number, since it is larger than the sum of its proper divisors (88066438).

161917274 is a wasteful number, since it uses less digits than its factorization.

161917274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101.

The product of its digits is 21168, while the sum is 38.

The square root of 161917274 is about 12724.6718621739. The cubic root of 161917274 is about 545.0433700020.

The spelling of 161917274 in words is "one hundred sixty-one million, nine hundred seventeen thousand, two hundred seventy-four".