173993081 has 2 divisors, whose sum is σ = 173993082. Its totient is φ = 173993080.

The previous prime is 173993023. The next prime is 173993101. The reversal of 173993081 is 180399371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119159056 + 54834025 = 10916^2 + 7405^2 .

It is an emirp because it is prime and its reverse (180399371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173993081 - 2²² = 169798777 is a prime.

It is a super-2 number, since 2×173993081² = 60547184471745122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (173993581) 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 as a sum of consecutive naturals, namely, 86996540 + 86996541.

It is an arithmetic number, because the mean of its divisors is an integer number (86996541).

Almost surely, 2^173993081 is an apocalyptic number.

It is an amenable number.

173993081 is a deficient number, since it is larger than the sum of its proper divisors (1).

173993081 is an equidigital number, since it uses as much as digits as its factorization.

173993081 is an odious number, because the sum of its binary digits is odd.

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

The square root of 173993081 is about 13190.6436916475. The cubic root of 173993081 is about 558.2696172235.

The spelling of 173993081 in words is "one hundred seventy-three million, nine hundred ninety-three thousand, eighty-one".