198356493 has 32 divisors (see below), whose sum is σ = 285659136. Its totient is φ = 121989888.

The previous prime is 198356489. The next prime is 198356503. The reversal of 198356493 is 394653891.

It is not a de Polignac number, because 198356493 - 2² = 198356489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198356453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 889380 + ... + 889602.

It is an arithmetic number, because the mean of its divisors is an integer number (8926848).

Almost surely, 2^198356493 is an apocalyptic number.

It is an amenable number.

198356493 is a deficient number, since it is larger than the sum of its proper divisors (87302643).

198356493 is a wasteful number, since it uses less digits than its factorization.

198356493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513.

The product of its digits is 699840, while the sum is 48.

The square root of 198356493 is about 14083.9090099304. The cubic root of 198356493 is about 583.1972584551.

The spelling of 198356493 in words is "one hundred ninety-eight million, three hundred fifty-six thousand, four hundred ninety-three".