399650201 has 2 divisors, whose sum is σ = 399650202. Its totient is φ = 399650200.

The previous prime is 399650191. The next prime is 399650203. The reversal of 399650201 is 102056993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228040201 + 171610000 = 15101^2 + 13100^2 .

It is a cyclic number.

It is not a de Polignac number, because 399650201 - 2¹⁰ = 399649177 is a prime.

Together with 399650203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399650203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199825100 + 199825101.

It is an arithmetic number, because the mean of its divisors is an integer number (199825101).

Almost surely, 2^399650201 is an apocalyptic number.

It is an amenable number.

399650201 is a deficient number, since it is larger than the sum of its proper divisors (1).

399650201 is an equidigital number, since it uses as much as digits as its factorization.

399650201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 399650201 is about 19991.2531122989. The cubic root of 399650201 is about 736.5914586675.

The spelling of 399650201 in words is "three hundred ninety-nine million, six hundred fifty thousand, two hundred one".