172160977 has 4 divisors (see below), whose sum is σ = 174095460. Its totient is φ = 170226496.

The previous prime is 172160969. The next prime is 172160981. The reversal of 172160977 is 779061271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779061271 = 163 ⋅4779517.

It can be written as a sum of positive squares in 2 ways, for example, as 43020481 + 129140496 = 6559^2 + 11364^2 .

It is a cyclic number.

It is not a de Polignac number, because 172160977 - 2³ = 172160969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172163977) 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, 967108 + ... + 967285.

It is an arithmetic number, because the mean of its divisors is an integer number (43523865).

Almost surely, 2^172160977 is an apocalyptic number.

It is an amenable number.

172160977 is a deficient number, since it is larger than the sum of its proper divisors (1934483).

172160977 is an equidigital number, since it uses as much as digits as its factorization.

172160977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934482.

The product of its (nonzero) digits is 37044, while the sum is 40.

The square root of 172160977 is about 13121.0128038959. The cubic root of 172160977 is about 556.3032188782.

The spelling of 172160977 in words is "one hundred seventy-two million, one hundred sixty thousand, nine hundred seventy-seven".