172070123 has 4 divisors (see below), whose sum is σ = 172630920. Its totient is φ = 171509328.

The previous prime is 172070113. The next prime is 172070131. The reversal of 172070123 is 321070271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172070123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172070113) 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, 279938 + ... + 280551.

It is an arithmetic number, because the mean of its divisors is an integer number (43157730).

Almost surely, 2^172070123 is an apocalyptic number.

172070123 is a deficient number, since it is larger than the sum of its proper divisors (560797).

172070123 is an equidigital number, since it uses as much as digits as its factorization.

172070123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560796.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 172070123 is about 13117.5501904891. The cubic root of 172070123 is about 556.2053429116.

The spelling of 172070123 in words is "one hundred seventy-two million, seventy thousand, one hundred twenty-three".