197899863 has 16 divisors (see below), whose sum is σ = 303590400. Its totient is φ = 112324896.

The previous prime is 197899859. The next prime is 197899879. The reversal of 197899863 is 368998791.

It is not a de Polignac number, because 197899863 - 2² = 197899859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197899797 and 197899806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197899853) 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, 28495 + ... + 34752.

It is an arithmetic number, because the mean of its divisors is an integer number (18974400).

Almost surely, 2^197899863 is an apocalyptic number.

197899863 is a deficient number, since it is larger than the sum of its proper divisors (105690537).

197899863 is a wasteful number, since it uses less digits than its factorization.

197899863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63406.

The product of its digits is 5878656, while the sum is 60.

The square root of 197899863 is about 14067.6886161160. The cubic root of 197899863 is about 582.7493948253.

The spelling of 197899863 in words is "one hundred ninety-seven million, eight hundred ninety-nine thousand, eight hundred sixty-three".