198987357 has 32 divisors (see below), whose sum is σ = 286848000. Its totient is φ = 122411520.

The previous prime is 198987343. The next prime is 198987377. The reversal of 198987357 is 753789891.

It is not a de Polignac number, because 198987357 - 2¹² = 198983261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198987297 and 198987306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198987377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239619 + ... + 240447.

It is an arithmetic number, because the mean of its divisors is an integer number (8964000).

Almost surely, 2^198987357 is an apocalyptic number.

It is an amenable number.

198987357 is a deficient number, since it is larger than the sum of its proper divisors (87860643).

198987357 is a wasteful number, since it uses less digits than its factorization.

198987357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its digits is 3810240, while the sum is 57.

The square root of 198987357 is about 14106.2878532944. The cubic root of 198987357 is about 583.8148817863.

The spelling of 198987357 in words is "one hundred ninety-eight million, nine hundred eighty-seven thousand, three hundred fifty-seven".