161673074 has 4 divisors (see below), whose sum is σ = 242509614. Its totient is φ = 80836536.

The previous prime is 161673059. The next prime is 161673097. The reversal of 161673074 is 470376161.

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., 161671225 + 1849 = 12715^2 + 43^2 .

It is a super-2 number, since 2×161673074² = 52276365713218952, 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, 40418267 + ... + 40418270.

Almost surely, 2^161673074 is an apocalyptic number.

161673074 is a deficient number, since it is larger than the sum of its proper divisors (80836540).

161673074 is an equidigital number, since it uses as much as digits as its factorization.

161673074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80836539.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 161673074 is about 12715.0727091905. The cubic root of 161673074 is about 544.7692247417.

The spelling of 161673074 in words is "one hundred sixty-one million, six hundred seventy-three thousand, seventy-four".