199710427 has 6 divisors (see below), whose sum is σ = 232316268. Its totient is φ = 171180324.

The previous prime is 199710391. The next prime is 199710439. The reversal of 199710427 is 724017991.

It is not a de Polignac number, because 199710427 - 2⁷ = 199710299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199710427.

It is not an unprimeable number, because it can be changed into a prime (199710527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2037813 + ... + 2037910.

It is an arithmetic number, because the mean of its divisors is an integer number (38719378).

Almost surely, 2^199710427 is an apocalyptic number.

199710427 is a deficient number, since it is larger than the sum of its proper divisors (32605841).

199710427 is an equidigital number, since it uses as much as digits as its factorization.

199710427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075737 (or 4075730 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 199710427 is about 14131.8939636554. The cubic root of 199710427 is about 584.5211724555.

The spelling of 199710427 in words is "one hundred ninety-nine million, seven hundred ten thousand, four hundred twenty-seven".