172293085 has 4 divisors (see below), whose sum is σ = 206751708. Its totient is φ = 137834464.

The previous prime is 172293061. The next prime is 172293091. The reversal of 172293085 is 580392271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135070884 + 37222201 = 11622^2 + 6101^2 .

It is a cyclic number.

It is not a de Polignac number, because 172293085 - 2⁷ = 172292957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17229304 + ... + 17229313.

It is an arithmetic number, because the mean of its divisors is an integer number (51687927).

Almost surely, 2^172293085 is an apocalyptic number.

It is an amenable number.

172293085 is a deficient number, since it is larger than the sum of its proper divisors (34458623).

172293085 is an equidigital number, since it uses as much as digits as its factorization.

172293085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34458622.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 172293085 is about 13126.0460535532. The cubic root of 172293085 is about 556.4454758845.

The spelling of 172293085 in words is "one hundred seventy-two million, two hundred ninety-three thousand, eighty-five".