172782117 has 12 divisors (see below), whose sum is σ = 249734784. Its totient is φ = 115113960.

The previous prime is 172782107. The next prime is 172782131. The reversal of 172782117 is 711287271.

It is not a de Polignac number, because 172782117 - 2⁷ = 172781989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172782107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11142 + ... + 21672.

It is an arithmetic number, because the mean of its divisors is an integer number (20811232).

Almost surely, 2^172782117 is an apocalyptic number.

It is an amenable number.

172782117 is a deficient number, since it is larger than the sum of its proper divisors (76952667).

172782117 is a wasteful number, since it uses less digits than its factorization.

172782117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12360 (or 12357 counting only the distinct ones).

The product of its digits is 10976, while the sum is 36.

The square root of 172782117 is about 13144.6611595735. The cubic root of 172782117 is about 556.9714451269.

The spelling of 172782117 in words is "one hundred seventy-two million, seven hundred eighty-two thousand, one hundred seventeen".