161642167 has 4 divisors (see below), whose sum is σ = 162257040. Its totient is φ = 161027296.

The previous prime is 161642149. The next prime is 161642179. The reversal of 161642167 is 761246161.

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

It is a cyclic number.

It is not a de Polignac number, because 161642167 - 2¹¹ = 161640119 is a prime.

It is a super-2 number, since 2×161642167² = 52256380304911778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161642147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307042 + ... + 307567.

It is an arithmetic number, because the mean of its divisors is an integer number (40564260).

Almost surely, 2^161642167 is an apocalyptic number.

161642167 is a deficient number, since it is larger than the sum of its proper divisors (614873).

161642167 is an equidigital number, since it uses as much as digits as its factorization.

161642167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614872.

The product of its digits is 12096, while the sum is 34.

The square root of 161642167 is about 12713.8572825087. The cubic root of 161642167 is about 544.7345080652.

The spelling of 161642167 in words is "one hundred sixty-one million, six hundred forty-two thousand, one hundred sixty-seven".