198930957 has 16 divisors (see below), whose sum is σ = 281128320. Its totient is φ = 124692992.

The previous prime is 198930917. The next prime is 198930961. The reversal of 198930957 is 759039891.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 198930957 - 2⁸ = 198930701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198930917) 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, 96544 + ... + 98582.

It is an arithmetic number, because the mean of its divisors is an integer number (17570520).

Almost surely, 2^198930957 is an apocalyptic number.

198930957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

198930957 is a deficient number, since it is larger than the sum of its proper divisors (82197363).

198930957 is a wasteful number, since it uses less digits than its factorization.

198930957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972.

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 198930957 is about 14104.2886031164. The cubic root of 198930957 is about 583.7597186991.

The spelling of 198930957 in words is "one hundred ninety-eight million, nine hundred thirty thousand, nine hundred fifty-seven".