198749955 has 8 divisors (see below), whose sum is σ = 317999952. Its totient is φ = 105999968.

The previous prime is 198749927. The next prime is 198749983. The reversal of 198749955 is 559947891.

It is an interprime number because it is at equal distance from previous prime (198749927) and next prime (198749983).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198749955 - 2¹⁰ = 198748931 is a prime.

It is a super-2 number, since 2×198749955² = 79003089225004050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198749895 and 198749904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6624984 + ... + 6625013.

It is an arithmetic number, because the mean of its divisors is an integer number (39749994).

Almost surely, 2^198749955 is an apocalyptic number.

198749955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198749955 is a deficient number, since it is larger than the sum of its proper divisors (119249997).

198749955 is a wasteful number, since it uses less digits than its factorization.

198749955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13250005.

The product of its digits is 4082400, while the sum is 57.

The square root of 198749955 is about 14097.8705838861. The cubic root of 198749955 is about 583.5826158144.

The spelling of 198749955 in words is "one hundred ninety-eight million, seven hundred forty-nine thousand, nine hundred fifty-five".