173398981 has 8 divisors (see below), whose sum is σ = 198257024. Its totient is φ = 148562640.

The previous prime is 173398961. The next prime is 173398991. The reversal of 173398981 is 189893371.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 173398981 - 2²¹ = 171301829 is a prime.

It is a super-2 number, since 2×173398981² = 60134413223676722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173398931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19111 + ... + 26683.

It is an arithmetic number, because the mean of its divisors is an integer number (24782128).

Almost surely, 2^173398981 is an apocalyptic number.

It is an amenable number.

173398981 is a deficient number, since it is larger than the sum of its proper divisors (24858043).

173398981 is an equidigital number, since it uses as much as digits as its factorization.

173398981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10851.

The product of its digits is 326592, while the sum is 49.

The square root of 173398981 is about 13168.1046851853. The cubic root of 173398981 is about 557.6334881138.

The spelling of 173398981 in words is "one hundred seventy-three million, three hundred ninety-eight thousand, nine hundred eighty-one".