172720454299 has 2 divisors, whose sum is σ = 172720454300. Its totient is φ = 172720454298.

The previous prime is 172720454261. The next prime is 172720454327. The reversal of 172720454299 is 992454027271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172720454299 - 2²⁹ = 172183583387 is a prime.

It is not a weakly prime, because it can be changed into another prime (172720454899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86360227149 + 86360227150.

It is an arithmetic number, because the mean of its divisors is an integer number (86360227150).

Almost surely, 2^172720454299 is an apocalyptic number.

172720454299 is a deficient number, since it is larger than the sum of its proper divisors (1).

172720454299 is an equidigital number, since it uses as much as digits as its factorization.

172720454299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 172720454299 in words is "one hundred seventy-two billion, seven hundred twenty million, four hundred fifty-four thousand, two hundred ninety-nine".