173921931401 has 2 divisors, whose sum is σ = 173921931402. Its totient is φ = 173921931400.

The previous prime is 173921931389. The next prime is 173921931409. The reversal of 173921931401 is 104139129371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133408293001 + 40513638400 = 365251^2 + 201280^2 .

It is a cyclic number.

It is not a de Polignac number, because 173921931401 - 2¹⁴ = 173921915017 is a prime.

It is not a weakly prime, because it can be changed into another prime (173921931409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86960965700 + 86960965701.

It is an arithmetic number, because the mean of its divisors is an integer number (86960965701).

Almost surely, 2^173921931401 is an apocalyptic number.

It is an amenable number.

173921931401 is a deficient number, since it is larger than the sum of its proper divisors (1).

173921931401 is an equidigital number, since it uses as much as digits as its factorization.

173921931401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 173921931401 in words is "one hundred seventy-three billion, nine hundred twenty-one million, nine hundred thirty-one thousand, four hundred one".