171492961 has 4 divisors (see below), whose sum is σ = 177025024. Its totient is φ = 165960900.

The previous prime is 171492953. The next prime is 171492977. The reversal of 171492961 is 169294171.

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: 169294171 = 7451 ⋅22721.

It is a cyclic number.

It is not a de Polignac number, because 171492961 - 2³ = 171492953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171492911) 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, 2765985 + ... + 2766046.

It is an arithmetic number, because the mean of its divisors is an integer number (44256256).

Almost surely, 2^171492961 is an apocalyptic number.

171492961 is the 5857-th centered decagonal number.

It is an amenable number.

171492961 is a deficient number, since it is larger than the sum of its proper divisors (5532063).

171492961 is an equidigital number, since it uses as much as digits as its factorization.

171492961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532062.

The product of its digits is 27216, while the sum is 40.

The square root of 171492961 is about 13095.5321006823. The cubic root of 171492961 is about 555.5827669175.

The spelling of 171492961 in words is "one hundred seventy-one million, four hundred ninety-two thousand, nine hundred sixty-one".