198431807 has 8 divisors (see below), whose sum is σ = 227190816. Its totient is φ = 169775712.

The previous prime is 198431797. The next prime is 198431843. The reversal of 198431807 is 708134891.

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 198431807 - 2⁶ = 198431743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198431507) 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, 21548 + ... + 29345.

It is an arithmetic number, because the mean of its divisors is an integer number (28398852).

Almost surely, 2^198431807 is an apocalyptic number.

198431807 is a deficient number, since it is larger than the sum of its proper divisors (28759009).

198431807 is an equidigital number, since it uses as much as digits as its factorization.

198431807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51457.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 198431807 is about 14086.5825167072. The cubic root of 198431807 is about 583.2710605270.

The spelling of 198431807 in words is "one hundred ninety-eight million, four hundred thirty-one thousand, eight hundred seven".