421839703 has 2 divisors, whose sum is σ = 421839704. Its totient is φ = 421839702.

The previous prime is 421839679. The next prime is 421839721. The reversal of 421839703 is 307938124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421839703 - 2¹⁷ = 421708631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421839403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210919851 + 210919852.

It is an arithmetic number, because the mean of its divisors is an integer number (210919852).

Almost surely, 2^421839703 is an apocalyptic number.

421839703 is a deficient number, since it is larger than the sum of its proper divisors (1).

421839703 is an equidigital number, since it uses as much as digits as its factorization.

421839703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 421839703 is about 20538.7366456654. The cubic root of 421839703 is about 749.9790826759.

The spelling of 421839703 in words is "four hundred twenty-one million, eight hundred thirty-nine thousand, seven hundred three".