172473717 has 8 divisors (see below), whose sum is σ = 247654624. Its totient is φ = 106137648.

The previous prime is 172473671. The next prime is 172473767. The reversal of 172473717 is 717374271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172473717 - 2⁷ = 172473589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 4422403 = 172473717 / (1 + 7 + 2 + 4 + 7 + 3 + 7 + 1 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172473767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211163 + ... + 2211240.

It is an arithmetic number, because the mean of its divisors is an integer number (30956828).

Almost surely, 2^172473717 is an apocalyptic number.

It is an amenable number.

172473717 is a deficient number, since it is larger than the sum of its proper divisors (75180907).

172473717 is a wasteful number, since it uses less digits than its factorization.

172473717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422419.

The product of its digits is 57624, while the sum is 39.

The square root of 172473717 is about 13132.9249217377. The cubic root of 172473717 is about 556.6398670370.

The spelling of 172473717 in words is "one hundred seventy-two million, four hundred seventy-three thousand, seven hundred seventeen".