198360981 has 80 divisors (see below), whose sum is σ = 386394624. Its totient is φ = 98413056.

The previous prime is 198360973. The next prime is 198361001. The reversal of 198360981 is 189063891.

It is not a de Polignac number, because 198360981 - 2³ = 198360973 is a prime.

It is a super-2 number, since 2×198360981² = 78694157566564722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198360941) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 124516 + ... + 126098.

Almost surely, 2^198360981 is an apocalyptic number.

It is an amenable number.

198360981 is a deficient number, since it is larger than the sum of its proper divisors (188033643).

198360981 is a wasteful number, since it uses less digits than its factorization.

198360981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 198360981 is about 14084.0683397944. The cubic root of 198360981 is about 583.2016568819.

The spelling of 198360981 in words is "one hundred ninety-eight million, three hundred sixty thousand, nine hundred eighty-one".