173390081 has 2 divisors, whose sum is σ = 173390082. Its totient is φ = 173390080.

The previous prime is 173390059. The next prime is 173390153. The reversal of 173390081 is 180093371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126000625 + 47389456 = 11225^2 + 6884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173390081 is a prime.

It is a super-2 number, since 2×173390081² = 60128240378373122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (173390011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86695040 + 86695041.

It is an arithmetic number, because the mean of its divisors is an integer number (86695041).

Almost surely, 2^173390081 is an apocalyptic number.

It is an amenable number.

173390081 is a deficient number, since it is larger than the sum of its proper divisors (1).

173390081 is an equidigital number, since it uses as much as digits as its factorization.

173390081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 173390081 is about 13167.7667430738. The cubic root of 173390081 is about 557.6239474523.

The spelling of 173390081 in words is "one hundred seventy-three million, three hundred ninety thousand, eighty-one".