420400199 has 2 divisors, whose sum is σ = 420400200. Its totient is φ = 420400198.

The previous prime is 420400181. The next prime is 420400223. The reversal of 420400199 is 991004024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420400199 - 2⁸ = 420399943 is a prime.

It is equal to p_22364615 and since 420400199 and 22364615 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420400699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210200099 + 210200100.

It is an arithmetic number, because the mean of its divisors is an integer number (210200100).

Almost surely, 2^420400199 is an apocalyptic number.

420400199 is a deficient number, since it is larger than the sum of its proper divisors (1).

420400199 is an equidigital number, since it uses as much as digits as its factorization.

420400199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 420400199 is about 20503.6630629749. The cubic root of 420400199 is about 749.1250234702.

The spelling of 420400199 in words is "four hundred twenty million, four hundred thousand, one hundred ninety-nine".