161398394 has 8 divisors (see below), whose sum is σ = 246201120. Its totient is φ = 79331356.

The previous prime is 161398387. The next prime is 161398421. The reversal of 161398394 is 493893161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683774 + ... + 684009.

It is an arithmetic number, because the mean of its divisors is an integer number (30775140).

Almost surely, 2^161398394 is an apocalyptic number.

161398394 is a deficient number, since it is larger than the sum of its proper divisors (84802726).

161398394 is a wasteful number, since it uses less digits than its factorization.

161398394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367844.

The product of its digits is 139968, while the sum is 44.

The square root of 161398394 is about 12704.2667635720. The cubic root of 161398394 is about 544.4605317504.

The spelling of 161398394 in words is "one hundred sixty-one million, three hundred ninety-eight thousand, three hundred ninety-four".