420129499 has 2 divisors, whose sum is σ = 420129500. Its totient is φ = 420129498.

The previous prime is 420129473. The next prime is 420129503. The reversal of 420129499 is 994921024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420129499 - 2⁷ = 420129371 is a prime.

It is not a weakly prime, because it can be changed into another prime (420129439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210064749 + 210064750.

It is an arithmetic number, because the mean of its divisors is an integer number (210064750).

Almost surely, 2^420129499 is an apocalyptic number.

420129499 is a deficient number, since it is larger than the sum of its proper divisors (1).

420129499 is an equidigital number, since it uses as much as digits as its factorization.

420129499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 420129499 is about 20497.0607405062. The cubic root of 420129499 is about 748.9641991845.

The spelling of 420129499 in words is "four hundred twenty million, one hundred twenty-nine thousand, four hundred ninety-nine".