172123046 has 4 divisors (see below), whose sum is σ = 258184572. Its totient is φ = 86061522.

The previous prime is 172123031. The next prime is 172123051. The reversal of 172123046 is 640321271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 640321271 = 22619 ⋅28309.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43030760 + ... + 43030763.

It is an arithmetic number, because the mean of its divisors is an integer number (64546143).

Almost surely, 2^172123046 is an apocalyptic number.

172123046 is a deficient number, since it is larger than the sum of its proper divisors (86061526).

172123046 is an equidigital number, since it uses as much as digits as its factorization.

172123046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86061525.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 172123046 is about 13119.5672946938. The cubic root of 172123046 is about 556.2623604374.

The spelling of 172123046 in words is "one hundred seventy-two million, one hundred twenty-three thousand, forty-six".