172372993 has 8 divisors (see below), whose sum is σ = 186863936. Its totient is φ = 158058000.

The previous prime is 172372961. The next prime is 172372999. The reversal of 172372993 is 399273271.

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

It is a cyclic number.

It is not a de Polignac number, because 172372993 - 2⁵ = 172372961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172372999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41943 + ... + 45868.

It is an arithmetic number, because the mean of its divisors is an integer number (23357992).

Almost surely, 2^172372993 is an apocalyptic number.

172372993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

172372993 is a deficient number, since it is larger than the sum of its proper divisors (14490943).

172372993 is a wasteful number, since it uses less digits than its factorization.

172372993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87975.

The product of its digits is 142884, while the sum is 43.

The square root of 172372993 is about 13129.0895723961. The cubic root of 172372993 is about 556.5314874091.

The spelling of 172372993 in words is "one hundred seventy-two million, three hundred seventy-two thousand, nine hundred ninety-three".