198687345 has 8 divisors (see below), whose sum is σ = 317899776. Its totient is φ = 105966576.

The previous prime is 198687343. The next prime is 198687413. The reversal of 198687345 is 543786891.

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

It is not a de Polignac number, because 198687345 - 2¹ = 198687343 is a prime.

It is a super-2 number, since 2×198687345² = 78953322126298050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198687341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6622897 + ... + 6622926.

It is an arithmetic number, because the mean of its divisors is an integer number (39737472).

Almost surely, 2^198687345 is an apocalyptic number.

198687345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198687345 is a deficient number, since it is larger than the sum of its proper divisors (119212431).

198687345 is a wasteful number, since it uses less digits than its factorization.

198687345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245831.

The product of its digits is 1451520, while the sum is 51.

The square root of 198687345 is about 14095.6498608613. The cubic root of 198687345 is about 583.5213295196.

The spelling of 198687345 in words is "one hundred ninety-eight million, six hundred eighty-seven thousand, three hundred forty-five".