420137279 has 2 divisors, whose sum is σ = 420137280. Its totient is φ = 420137278.

The previous prime is 420137233. The next prime is 420137281. The reversal of 420137279 is 972731024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420137279 - 2¹² = 420133183 is a prime.

Together with 420137281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420134279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210068639 + 210068640.

It is an arithmetic number, because the mean of its divisors is an integer number (210068640).

Almost surely, 2^420137279 is an apocalyptic number.

420137279 is a deficient number, since it is larger than the sum of its proper divisors (1).

420137279 is an equidigital number, since it uses as much as digits as its factorization.

420137279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 420137279 is about 20497.2505229360. The cubic root of 420137279 is about 748.9688222872.

The spelling of 420137279 in words is "four hundred twenty million, one hundred thirty-seven thousand, two hundred seventy-nine".