161914919 has 8 divisors (see below), whose sum is σ = 171644688. Its totient is φ = 152208000.

The previous prime is 161914913. The next prime is 161914927. The reversal of 161914919 is 919419161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161914919 - 2⁸ = 161914663 is a prime.

It is a super-2 number, since 2×161914919² = 52432881989553122, 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 (161914913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10169 + ... + 20669.

It is an arithmetic number, because the mean of its divisors is an integer number (21455586).

Almost surely, 2^161914919 is an apocalyptic number.

161914919 is a deficient number, since it is larger than the sum of its proper divisors (9729769).

161914919 is a wasteful number, since it uses less digits than its factorization.

161914919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11425.

The product of its digits is 17496, while the sum is 41.

The square root of 161914919 is about 12724.5793250700. The cubic root of 161914919 is about 545.0407275346.

The spelling of 161914919 in words is "one hundred sixty-one million, nine hundred fourteen thousand, nine hundred nineteen".