161173951 has 8 divisors (see below), whose sum is σ = 164922624. Its totient is φ = 157438680.

The previous prime is 161173937. The next prime is 161173963. The reversal of 161173951 is 159371161.

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 161173951 - 2⁷ = 161173823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161173921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23416 + ... + 29506.

It is an arithmetic number, because the mean of its divisors is an integer number (20615328).

Almost surely, 2^161173951 is an apocalyptic number.

161173951 is a deficient number, since it is larger than the sum of its proper divisors (3748673).

161173951 is an equidigital number, since it uses as much as digits as its factorization.

161173951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701.

The product of its digits is 5670, while the sum is 34.

The square root of 161173951 is about 12695.4303196071. The cubic root of 161173951 is about 544.2080363766.

The spelling of 161173951 in words is "one hundred sixty-one million, one hundred seventy-three thousand, nine hundred fifty-one".