160861994 has 4 divisors (see below), whose sum is σ = 241292994. Its totient is φ = 80430996.

The previous prime is 160861991. The next prime is 160862017. The reversal of 160861994 is 499168061.

160861994 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 499168061 = 7 ⋅71309723.

It can be written as a sum of positive squares in only one way, i.e., 159390625 + 1471369 = 12625^2 + 1213^2 .

It is a super-2 number, since 2×160861994² = 51753162227312072, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (160861991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40215497 + ... + 40215500.

Almost surely, 2^160861994 is an apocalyptic number.

160861994 is a deficient number, since it is larger than the sum of its proper divisors (80431000).

160861994 is an equidigital number, since it uses as much as digits as its factorization.

160861994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80430999.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 160861994 is about 12683.1381763348. The cubic root of 160861994 is about 543.8566992972.

The spelling of 160861994 in words is "one hundred sixty million, eight hundred sixty-one thousand, nine hundred ninety-four".