160172861 has 4 divisors (see below), whose sum is σ = 169594812. Its totient is φ = 150750912.

The previous prime is 160172849. The next prime is 160172863. The reversal of 160172861 is 168271061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168271061 = 7 ⋅24038723.

It can be written as a sum of positive squares in 2 ways, for example, as 141467236 + 18705625 = 11894^2 + 4325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-160172861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160172863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4710950 + ... + 4710983.

It is an arithmetic number, because the mean of its divisors is an integer number (42398703).

Almost surely, 2^160172861 is an apocalyptic number.

It is an amenable number.

160172861 is a deficient number, since it is larger than the sum of its proper divisors (9421951).

160172861 is an equidigital number, since it uses as much as digits as its factorization.

160172861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9421950.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 160172861 is about 12655.9417271098. The cubic root of 160172861 is about 543.0789600137.

The spelling of 160172861 in words is "one hundred sixty million, one hundred seventy-two thousand, eight hundred sixty-one".