420858791 has 2 divisors, whose sum is σ = 420858792. Its totient is φ = 420858790.

The previous prime is 420858773. The next prime is 420858863. The reversal of 420858791 is 197858024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420858791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420858491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210429395 + 210429396.

It is an arithmetic number, because the mean of its divisors is an integer number (210429396).

Almost surely, 2^420858791 is an apocalyptic number.

420858791 is a deficient number, since it is larger than the sum of its proper divisors (1).

420858791 is an equidigital number, since it uses as much as digits as its factorization.

420858791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 420858791 is about 20514.8431873120. The cubic root of 420858791 is about 749.3973179029.

The spelling of 420858791 in words is "four hundred twenty million, eight hundred fifty-eight thousand, seven hundred ninety-one".