420765539 has 2 divisors, whose sum is σ = 420765540. Its totient is φ = 420765538.

The previous prime is 420765491. The next prime is 420765559. The reversal of 420765539 is 935567024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420765539 - 2²⁸ = 152330083 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 420765496 and 420765505.

It is not a weakly prime, because it can be changed into another prime (420765559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210382769 + 210382770.

It is an arithmetic number, because the mean of its divisors is an integer number (210382770).

Almost surely, 2^420765539 is an apocalyptic number.

420765539 is a deficient number, since it is larger than the sum of its proper divisors (1).

420765539 is an equidigital number, since it uses as much as digits as its factorization.

420765539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 420765539 is about 20512.5702680088. The cubic root of 420765539 is about 749.3419644508.

The spelling of 420765539 in words is "four hundred twenty million, seven hundred sixty-five thousand, five hundred thirty-nine".