173211739481449 has 2 divisors, whose sum is σ = 173211739481450. Its totient is φ = 173211739481448.

The previous prime is 173211739481401. The next prime is 173211739481483. The reversal of 173211739481449 is 944184937112371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166151197701225 + 7060541780224 = 12889965^2 + 2657168^2 .

It is a cyclic number.

It is not a de Polignac number, because 173211739481449 - 2³¹ = 173209591997801 is a prime.

It is not a weakly prime, because it can be changed into another prime (173211739484449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86605869740724 + 86605869740725.

It is an arithmetic number, because the mean of its divisors is an integer number (86605869740725).

Almost surely, 2^{173211739481449} is an apocalyptic number.

It is an amenable number.

173211739481449 is a deficient number, since it is larger than the sum of its proper divisors (1).

173211739481449 is an equidigital number, since it uses as much as digits as its factorization.

173211739481449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 64.

The spelling of 173211739481449 in words is "one hundred seventy-three trillion, two hundred eleven billion, seven hundred thirty-nine million, four hundred eighty-one thousand, four hundred forty-nine".