400199 has 2 divisors, whose sum is σ = 400200. Its totient is φ = 400198.

The previous prime is 400187. The next prime is 400207. The reversal of 400199 is 991004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400199 - 2¹² = 396103 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200099 + 200100.

It is an arithmetic number, because the mean of its divisors is an integer number (200100).

2⁴⁰⁰¹⁹⁹ is an apocalyptic number.

400199 is a deficient number, since it is larger than the sum of its proper divisors (1).

400199 is an equidigital number, since it uses as much as digits as its factorization.

400199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 400199 is about 632.6128357850. The cubic root of 400199 is about 73.6928466516.

The spelling of 400199 in words is "four hundred thousand, one hundred ninety-nine".