199995401 has 2 divisors, whose sum is σ = 199995402. Its totient is φ = 199995400.

The previous prime is 199995391. The next prime is 199995431. The reversal of 199995401 is 104599991.

It is a happy number.

199995401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116748025 + 83247376 = 10805^2 + 9124^2 .

It is a cyclic number.

It is not a de Polignac number, because 199995401 - 2⁶ = 199995337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199995431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99997700 + 99997701.

It is an arithmetic number, because the mean of its divisors is an integer number (99997701).

Almost surely, 2^199995401 is an apocalyptic number.

It is an amenable number.

199995401 is a deficient number, since it is larger than the sum of its proper divisors (1).

199995401 is an equidigital number, since it uses as much as digits as its factorization.

199995401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131220, while the sum is 47.

The square root of 199995401 is about 14141.9730235919. The cubic root of 199995401 is about 584.7990650890.

The spelling of 199995401 in words is "one hundred ninety-nine million, nine hundred ninety-five thousand, four hundred one".