161477194 has 4 divisors (see below), whose sum is σ = 242215794. Its totient is φ = 80738596.

The previous prime is 161477179. The next prime is 161477279. The reversal of 161477194 is 491774161.

161477194 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 152399025 + 9078169 = 12345^2 + 3013^2 .

It is a super-2 number, since 2×161477194² = 52149768364227272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40369297 + ... + 40369300.

Almost surely, 2^161477194 is an apocalyptic number.

161477194 is a deficient number, since it is larger than the sum of its proper divisors (80738600).

161477194 is an equidigital number, since it uses as much as digits as its factorization.

161477194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80738599.

The product of its digits is 42336, while the sum is 40.

The square root of 161477194 is about 12707.3677053904. The cubic root of 161477194 is about 544.5491251753.

The spelling of 161477194 in words is "one hundred sixty-one million, four hundred seventy-seven thousand, one hundred ninety-four".