172197308829 has 32 divisors (see below), whose sum is σ = 286797844480. Its totient is φ = 89473678272.

The previous prime is 172197308809. The next prime is 172197308851. The reversal of 172197308829 is 928803791271.

It is not a de Polignac number, because 172197308829 - 2¹¹ = 172197306781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172197308809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4688869 + ... + 4725450.

It is an arithmetic number, because the mean of its divisors is an integer number (8962432640).

Almost surely, 2^172197308829 is an apocalyptic number.

It is an amenable number.

172197308829 is a deficient number, since it is larger than the sum of its proper divisors (114600535651).

172197308829 is a wasteful number, since it uses less digits than its factorization.

172197308829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9414409.

The product of its (nonzero) digits is 3048192, while the sum is 57.

The spelling of 172197308829 in words is "one hundred seventy-two billion, one hundred ninety-seven million, three hundred eight thousand, eight hundred twenty-nine".