172315623 has 8 divisors (see below), whose sum is σ = 235963888. Its totient is φ = 111772224.

The previous prime is 172315607. The next prime is 172315631. The reversal of 172315623 is 326513271.

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

It is not a de Polignac number, because 172315623 - 2⁴ = 172315607 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 (172315643) 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, 776086 + ... + 776307.

It is an arithmetic number, because the mean of its divisors is an integer number (29495486).

Almost surely, 2^172315623 is an apocalyptic number.

172315623 is a deficient number, since it is larger than the sum of its proper divisors (63648265).

172315623 is a wasteful number, since it uses less digits than its factorization.

172315623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552433.

The product of its digits is 7560, while the sum is 30.

The square root of 172315623 is about 13126.9045475314. The cubic root of 172315623 is about 556.4697380718.

Adding to 172315623 its reverse (326513271), we get a palindrome (498828894).

The spelling of 172315623 in words is "one hundred seventy-two million, three hundred fifteen thousand, six hundred twenty-three".