172197340993 has 16 divisors (see below), whose sum is σ = 186225621120. Its totient is φ = 158668730496.

The previous prime is 172197340981. The next prime is 172197341021. The reversal of 172197340993 is 399043791271.

It is a cyclic number.

It is not a de Polignac number, because 172197340993 - 2²⁹ = 171660470081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172197340963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998621 + ... + 2082997.

It is an arithmetic number, because the mean of its divisors is an integer number (11639101320).

Almost surely, 2^172197340993 is an apocalyptic number.

It is an amenable number.

172197340993 is a deficient number, since it is larger than the sum of its proper divisors (14028280127).

172197340993 is a wasteful number, since it uses less digits than its factorization.

172197340993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87336.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The spelling of 172197340993 in words is "one hundred seventy-two billion, one hundred ninety-seven million, three hundred forty thousand, nine hundred ninety-three".