172499117 has 4 divisors (see below), whose sum is σ = 197141856. Its totient is φ = 147856380.

The previous prime is 172499113. The next prime is 172499137. The reversal of 172499117 is 711994271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 711994271 = 467 ⋅1524613.

It is not a de Polignac number, because 172499117 - 2² = 172499113 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 (172499111) 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, 12321359 + ... + 12321372.

It is an arithmetic number, because the mean of its divisors is an integer number (49285464).

Almost surely, 2^172499117 is an apocalyptic number.

It is an amenable number.

172499117 is a deficient number, since it is larger than the sum of its proper divisors (24642739).

172499117 is an equidigital number, since it uses as much as digits as its factorization.

172499117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24642738.

The product of its digits is 31752, while the sum is 41.

The square root of 172499117 is about 13133.8919212852. The cubic root of 172499117 is about 556.6671909270.

The spelling of 172499117 in words is "one hundred seventy-two million, four hundred ninety-nine thousand, one hundred seventeen".