420154199 has 2 divisors, whose sum is σ = 420154200. Its totient is φ = 420154198.

The previous prime is 420154187. The next prime is 420154261. The reversal of 420154199 is 991451024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420154199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420154699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210077099 + 210077100.

It is an arithmetic number, because the mean of its divisors is an integer number (210077100).

Almost surely, 2^420154199 is an apocalyptic number.

420154199 is a deficient number, since it is larger than the sum of its proper divisors (1).

420154199 is an equidigital number, since it uses as much as digits as its factorization.

420154199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 420154199 is about 20497.6632570642. The cubic root of 420154199 is about 748.9788764473.

The spelling of 420154199 in words is "four hundred twenty million, one hundred fifty-four thousand, one hundred ninety-nine".