173868397 has 2 divisors, whose sum is σ = 173868398. Its totient is φ = 173868396.

The previous prime is 173868391. The next prime is 173868509. The reversal of 173868397 is 793868371.

It is a happy number.

173868397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172896201 + 972196 = 13149^2 + 986^2 .

It is an emirp because it is prime and its reverse (793868371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173868397 - 2³ = 173868389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173868391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86934198 + 86934199.

It is an arithmetic number, because the mean of its divisors is an integer number (86934199).

Almost surely, 2^173868397 is an apocalyptic number.

It is an amenable number.

173868397 is a deficient number, since it is larger than the sum of its proper divisors (1).

173868397 is an equidigital number, since it uses as much as digits as its factorization.

173868397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 173868397 is about 13185.9166158443. The cubic root of 173868397 is about 558.1362327577.

The spelling of 173868397 in words is "one hundred seventy-three million, eight hundred sixty-eight thousand, three hundred ninety-seven".