420030139 has 2 divisors, whose sum is σ = 420030140. Its totient is φ = 420030138.

The previous prime is 420030133. The next prime is 420030167. The reversal of 420030139 is 931030024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420030139 - 2⁷ = 420030011 is a prime.

It is not a weakly prime, because it can be changed into another prime (420030133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210015069 + 210015070.

It is an arithmetic number, because the mean of its divisors is an integer number (210015070).

Almost surely, 2^420030139 is an apocalyptic number.

420030139 is a deficient number, since it is larger than the sum of its proper divisors (1).

420030139 is an equidigital number, since it uses as much as digits as its factorization.

420030139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 420030139 is about 20494.6368350356. The cubic root of 420030139 is about 748.9051515573.

The spelling of 420030139 in words is "four hundred twenty million, thirty thousand, one hundred thirty-nine".