172383817 has 4 divisors (see below), whose sum is σ = 173699856. Its totient is φ = 171067780.

The previous prime is 172383793. The next prime is 172383823. The reversal of 172383817 is 718383271.

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: 718383271 = 11213 ⋅64067.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172383817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172383817.

It is not an unprimeable number, because it can be changed into a prime (172383217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657823 + ... + 658084.

It is an arithmetic number, because the mean of its divisors is an integer number (43424964).

Almost surely, 2^172383817 is an apocalyptic number.

It is an amenable number.

172383817 is a deficient number, since it is larger than the sum of its proper divisors (1316039).

172383817 is a wasteful number, since it uses less digits than its factorization.

172383817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316038.

The product of its digits is 56448, while the sum is 40.

The square root of 172383817 is about 13129.5017803419. The cubic root of 172383817 is about 556.5431361224.

The spelling of 172383817 in words is "one hundred seventy-two million, three hundred eighty-three thousand, eight hundred seventeen".