172100791 has 4 divisors (see below), whose sum is σ = 172152112. Its totient is φ = 172049472.

The previous prime is 172100777. The next prime is 172100807. The reversal of 172100791 is 197001271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197001271 = 7393 ⋅26647.

It is a cyclic number.

It is not a de Polignac number, because 172100791 - 2⁵ = 172100759 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 (172100701) 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, 20250 + ... + 27463.

It is an arithmetic number, because the mean of its divisors is an integer number (43038028).

Almost surely, 2^172100791 is an apocalyptic number.

172100791 is a deficient number, since it is larger than the sum of its proper divisors (51321).

172100791 is an equidigital number, since it uses as much as digits as its factorization.

172100791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51320.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 172100791 is about 13118.7191066811. The cubic root of 172100791 is about 556.2383850455.

The spelling of 172100791 in words is "one hundred seventy-two million, one hundred thousand, seven hundred ninety-one".