161614994 has 4 divisors (see below), whose sum is σ = 242422494. Its totient is φ = 80807496.

The previous prime is 161614963. The next prime is 161615017. The reversal of 161614994 is 499416161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499416161 = 233 ⋅2143417.

It can be written as a sum of positive squares in only one way, i.e., 132595225 + 29019769 = 11515^2 + 5387^2 .

It is a super-2 number, since 2×161614994² = 52238812571240072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40403747 + ... + 40403750.

Almost surely, 2^161614994 is an apocalyptic number.

161614994 is a deficient number, since it is larger than the sum of its proper divisors (80807500).

161614994 is an equidigital number, since it uses as much as digits as its factorization.

161614994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80807499.

The product of its digits is 46656, while the sum is 41.

The square root of 161614994 is about 12712.7886004606. The cubic root of 161614994 is about 544.7039819952.

The spelling of 161614994 in words is "one hundred sixty-one million, six hundred fourteen thousand, nine hundred ninety-four".