198487907 has 4 divisors (see below), whose sum is σ = 207117840. Its totient is φ = 189857976.

The previous prime is 198487897. The next prime is 198487931. The reversal of 198487907 is 709784891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709784891 = 6011 ⋅118081.

It is a cyclic number.

It is not a de Polignac number, because 198487907 - 2⁶ = 198487843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198487967) 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 3 ways as a sum of consecutive naturals, for example, 4314932 + ... + 4314977.

It is an arithmetic number, because the mean of its divisors is an integer number (51779460).

Almost surely, 2^198487907 is an apocalyptic number.

198487907 is a deficient number, since it is larger than the sum of its proper divisors (8629933).

198487907 is an equidigital number, since it uses as much as digits as its factorization.

198487907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8629932.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 198487907 is about 14088.5736325577. The cubic root of 198487907 is about 583.3260221850.

The spelling of 198487907 in words is "one hundred ninety-eight million, four hundred eighty-seven thousand, nine hundred seven".