161377113 has 4 divisors (see below), whose sum is σ = 215169488. Its totient is φ = 107584740.

The previous prime is 161377109. The next prime is 161377129. The reversal of 161377113 is 311773161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161377113 - 2² = 161377109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161377163) 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, 26896183 + ... + 26896188.

It is an arithmetic number, because the mean of its divisors is an integer number (53792372).

Almost surely, 2^161377113 is an apocalyptic number.

It is an amenable number.

161377113 is a deficient number, since it is larger than the sum of its proper divisors (53792375).

161377113 is an equidigital number, since it uses as much as digits as its factorization.

161377113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53792374.

The product of its digits is 2646, while the sum is 30.

The square root of 161377113 is about 12703.4291827050. The cubic root of 161377113 is about 544.4366009591.

The spelling of 161377113 in words is "one hundred sixty-one million, three hundred seventy-seven thousand, one hundred thirteen".