172092857 has 4 divisors (see below), whose sum is σ = 172146420. Its totient is φ = 172039296.

The previous prime is 172092821. The next prime is 172092863. The reversal of 172092857 is 758290271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758290271 = 691 ⋅1097381.

It can be written as a sum of positive squares in 2 ways, for example, as 122235136 + 49857721 = 11056^2 + 7061^2 .

It is a cyclic number.

It is not a de Polignac number, because 172092857 - 2¹⁴ = 172076473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172095857) 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, 21632 + ... + 28497.

It is an arithmetic number, because the mean of its divisors is an integer number (43036605).

Almost surely, 2^172092857 is an apocalyptic number.

It is an amenable number.

172092857 is a deficient number, since it is larger than the sum of its proper divisors (53563).

172092857 is an equidigital number, since it uses as much as digits as its factorization.

172092857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53562.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 172092857 is about 13118.4167108687. The cubic root of 172092857 is about 556.2298372189.

The spelling of 172092857 in words is "one hundred seventy-two million, ninety-two thousand, eight hundred fifty-seven".