199701427 has 2 divisors, whose sum is σ = 199701428. Its totient is φ = 199701426.

The previous prime is 199701421. The next prime is 199701521. The reversal of 199701427 is 724107991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199701427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199701427.

It is not a weakly prime, because it can be changed into another prime (199701421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99850713 + 99850714.

It is an arithmetic number, because the mean of its divisors is an integer number (99850714).

Almost surely, 2^199701427 is an apocalyptic number.

199701427 is a deficient number, since it is larger than the sum of its proper divisors (1).

199701427 is an equidigital number, since it uses as much as digits as its factorization.

199701427 is an evil number, because the sum of its binary digits is even.

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

The square root of 199701427 is about 14131.5755314119. The cubic root of 199701427 is about 584.5123917930.

The spelling of 199701427 in words is "one hundred ninety-nine million, seven hundred one thousand, four hundred twenty-seven".