161897334 has 16 divisors (see below), whose sum is σ = 324606960. Its totient is φ = 53830400.

The previous prime is 161897327. The next prime is 161897339. The reversal of 161897334 is 433798161.

161897334 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161897339) 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, 31239 + ... + 36050.

It is an arithmetic number, because the mean of its divisors is an integer number (20287935).

Almost surely, 2^161897334 is an apocalyptic number.

161897334 is an abundant number, since it is smaller than the sum of its proper divisors (162709626).

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

161897334 is a wasteful number, since it uses less digits than its factorization.

161897334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67695.

The product of its digits is 108864, while the sum is 42.

The square root of 161897334 is about 12723.8883207925. Note that the first 3 decimals coincide. The cubic root of 161897334 is about 545.0209951792.

The spelling of 161897334 in words is "one hundred sixty-one million, eight hundred ninety-seven thousand, three hundred thirty-four".