173372464823021 has 2 divisors, whose sum is σ = 173372464823022. Its totient is φ = 173372464823020.

The previous prime is 173372464823017. The next prime is 173372464823023. The reversal of 173372464823021 is 120328464273371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125387611870921 + 47984852952100 = 11197661^2 + 6927110^2 .

It is a cyclic number.

It is not a de Polignac number, because 173372464823021 - 2² = 173372464823017 is a prime.

Together with 173372464823023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173372464823023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86686232411510 + 86686232411511.

It is an arithmetic number, because the mean of its divisors is an integer number (86686232411511).

Almost surely, 2^{173372464823021} is an apocalyptic number.

It is an amenable number.

173372464823021 is a deficient number, since it is larger than the sum of its proper divisors (1).

173372464823021 is an equidigital number, since it uses as much as digits as its factorization.

173372464823021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 53.

The spelling of 173372464823021 in words is "one hundred seventy-three trillion, three hundred seventy-two billion, four hundred sixty-four million, eight hundred twenty-three thousand, twenty-one".