2172797 has 6 divisors (see below), whose sum is σ = 2388414. Its totient is φ = 1975160.

The previous prime is 2172791. The next prime is 2172799. The reversal of 2172797 is 7972712.

It can be written as a sum of positive squares in only one way, i.e., 2172676 + 121 = 1474^2 + 11^2 .

It is not a de Polignac number, because 2172797 - 2⁶ = 2172733 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 (2172791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8858 + ... + 9099.

It is an arithmetic number, because the mean of its divisors is an integer number (398069).

2^2172797 is an apocalyptic number.

It is an amenable number.

2172797 is a deficient number, since it is larger than the sum of its proper divisors (215617).

2172797 is a wasteful number, since it uses less digits than its factorization.

2172797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17979 (or 17968 counting only the distinct ones).

The product of its digits is 12348, while the sum is 35.

The square root of 2172797 is about 1474.0410442047. The cubic root of 2172797 is about 129.5208594773.

The spelling of 2172797 in words is "two million, one hundred seventy-two thousand, seven hundred ninety-seven".