172239084997 has 12 divisors (see below), whose sum is σ = 203866482976. Its totient is φ = 142542686160.

The previous prime is 172239084973. The next prime is 172239085061. The reversal of 172239084997 is 799480932271.

It is not a de Polignac number, because 172239084997 - 2¹¹ = 172239082949 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 (172239084917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14622879 + ... + 14634652.

Almost surely, 2^172239084997 is an apocalyptic number.

It is an amenable number.

172239084997 is a deficient number, since it is larger than the sum of its proper divisors (31627397979).

172239084997 is an equidigital number, since it uses as much as digits as its factorization.

172239084997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29257596 (or 29257567 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 172239084997 in words is "one hundred seventy-two billion, two hundred thirty-nine million, eighty-four thousand, nine hundred ninety-seven".