421340305439 has 2 divisors, whose sum is σ = 421340305440. Its totient is φ = 421340305438.

The previous prime is 421340305411. The next prime is 421340305471. The reversal of 421340305439 is 934503043124.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421340305439 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421340305409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210670152719 + 210670152720.

It is an arithmetic number, because the mean of its divisors is an integer number (210670152720).

Almost surely, 2^421340305439 is an apocalyptic number.

421340305439 is a deficient number, since it is larger than the sum of its proper divisors (1).

421340305439 is an equidigital number, since it uses as much as digits as its factorization.

421340305439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 421340305439 in words is "four hundred twenty-one billion, three hundred forty million, three hundred five thousand, four hundred thirty-nine".