172454986729 has 9 divisors (see below), whose sum is σ = 173222906493. Its totient is φ = 171690461772.

The previous prime is 172454986727. The next prime is 172454986747. The reversal of 172454986729 is 927689454271.

The square root of 172454986729 is 415277.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 172454986729 - 2¹ = 172454986727 is a prime.

It is a super-2 number, since 2×172454986729² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172454986727) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 109217062 + ... + 109218640.

Almost surely, 2^172454986729 is an apocalyptic number.

172454986729 is the 415277-th square number.

172454986729 is the 207639-th centered octagonal number.

It is an amenable number.

172454986729 is a deficient number, since it is larger than the sum of its proper divisors (767919764).

172454986729 is an frugal number, since it uses more digits than its factorization.

172454986729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684 (or 1842 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 64.

Multiplying 172454986729 by its sum of digits (64), we get a square (11037119150656 = 3322216²).

The spelling of 172454986729 in words is "one hundred seventy-two billion, four hundred fifty-four million, nine hundred eighty-six thousand, seven hundred twenty-nine".