198888613 has 16 divisors (see below), whose sum is σ = 258748416. Its totient is φ = 148238640.

The previous prime is 198888607. The next prime is 198888619. The reversal of 198888613 is 316888891.

It is an interprime number because it is at equal distance from previous prime (198888607) and next prime (198888619).

It is not a de Polignac number, because 198888613 - 2¹³ = 198880421 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 (198888619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54381 + ... + 57922.

It is an arithmetic number, because the mean of its divisors is an integer number (16171776).

Almost surely, 2^198888613 is an apocalyptic number.

It is an amenable number.

198888613 is a deficient number, since it is larger than the sum of its proper divisors (59859803).

198888613 is a wasteful number, since it uses less digits than its factorization.

198888613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112344.

The product of its digits is 663552, while the sum is 52.

The square root of 198888613 is about 14102.7874195139. The cubic root of 198888613 is about 583.7182964959.

It can be divided in two parts, 1988 and 88613, that added together give a square (90601 = 301²).

The spelling of 198888613 in words is "one hundred ninety-eight million, eight hundred eighty-eight thousand, six hundred thirteen".