172123077 has 16 divisors (see below), whose sum is σ = 262577792. Its totient is φ = 98245440.

The previous prime is 172123057. The next prime is 172123093. The reversal of 172123077 is 770321271.

It is not a de Polignac number, because 172123077 - 2⁶ = 172123013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172123027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16827 + ... + 25047.

It is an arithmetic number, because the mean of its divisors is an integer number (16411112).

Almost surely, 2^172123077 is an apocalyptic number.

It is an amenable number.

172123077 is a deficient number, since it is larger than the sum of its proper divisors (90454715).

172123077 is an equidigital number, since it uses as much as digits as its factorization.

172123077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9228.

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 172123077 is about 13119.5684761352. The cubic root of 172123077 is about 556.2623938323.

The spelling of 172123077 in words is "one hundred seventy-two million, one hundred twenty-three thousand, seventy-seven".