161313177 has 4 divisors (see below), whose sum is σ = 215084240. Its totient is φ = 107542116.

The previous prime is 161313161. The next prime is 161313193. The reversal of 161313177 is 771313161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 771313161 = 3 ⋅257104387.

It is an interprime number because it is at equal distance from previous prime (161313161) and next prime (161313193).

It is not a de Polignac number, because 161313177 - 2⁴ = 161313161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161313107) 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, 26885527 + ... + 26885532.

It is an arithmetic number, because the mean of its divisors is an integer number (53771060).

Almost surely, 2^161313177 is an apocalyptic number.

It is an amenable number.

161313177 is a deficient number, since it is larger than the sum of its proper divisors (53771063).

161313177 is an equidigital number, since it uses as much as digits as its factorization.

161313177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53771062.

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

The square root of 161313177 is about 12700.9124475370. The cubic root of 161313177 is about 544.3646913475.

The spelling of 161313177 in words is "one hundred sixty-one million, three hundred thirteen thousand, one hundred seventy-seven".