173331997 has 2 divisors, whose sum is σ = 173331998. Its totient is φ = 173331996.

The previous prime is 173331973. The next prime is 173332001. The reversal of 173331997 is 799133371.

173331997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119661721 + 53670276 = 10939^2 + 7326^2 .

It is a cyclic number.

It is not a de Polignac number, because 173331997 - 2¹⁵ = 173299229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173331937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86665998 + 86665999.

It is an arithmetic number, because the mean of its divisors is an integer number (86665999).

Almost surely, 2^173331997 is an apocalyptic number.

It is an amenable number.

173331997 is a deficient number, since it is larger than the sum of its proper divisors (1).

173331997 is an equidigital number, since it uses as much as digits as its factorization.

173331997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107163, while the sum is 43.

The square root of 173331997 is about 13165.5610210883. The cubic root of 173331997 is about 557.5616742886.

The spelling of 173331997 in words is "one hundred seventy-three million, three hundred thirty-one thousand, nine hundred ninety-seven".