420270839 has 2 divisors, whose sum is σ = 420270840. Its totient is φ = 420270838.

The previous prime is 420270791. The next prime is 420270853. The reversal of 420270839 is 938072024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420270839 is a prime.

It is a super-3 number, since 3×420270839³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 420270799 and 420270808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420270439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210135419 + 210135420.

It is an arithmetic number, because the mean of its divisors is an integer number (210135420).

Almost surely, 2^420270839 is an apocalyptic number.

420270839 is a deficient number, since it is larger than the sum of its proper divisors (1).

420270839 is an equidigital number, since it uses as much as digits as its factorization.

420270839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 420270839 is about 20500.5082619919. The cubic root of 420270839 is about 749.0481786332.

The spelling of 420270839 in words is "four hundred twenty million, two hundred seventy thousand, eight hundred thirty-nine".