398099173 has 4 divisors (see below), whose sum is σ = 398294208. Its totient is φ = 397904140.

The previous prime is 398099159. The next prime is 398099189. The reversal of 398099173 is 371990893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 398099173 - 2¹⁷ = 397968101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398099473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94423 + ... + 98548.

It is an arithmetic number, because the mean of its divisors is an integer number (99573552).

Almost surely, 2^398099173 is an apocalyptic number.

It is an amenable number.

398099173 is a deficient number, since it is larger than the sum of its proper divisors (195035).

398099173 is a wasteful number, since it uses less digits than its factorization.

398099173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195034.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 398099173 is about 19952.4227350966. The cubic root of 398099173 is about 735.6373283341.

The spelling of 398099173 in words is "three hundred ninety-eight million, ninety-nine thousand, one hundred seventy-three".