421034705591 has 2 divisors, whose sum is σ = 421034705592. Its totient is φ = 421034705590.

The previous prime is 421034705587. The next prime is 421034705599. The reversal of 421034705591 is 195507430124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421034705591 - 2² = 421034705587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421034705599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210517352795 + 210517352796.

It is an arithmetic number, because the mean of its divisors is an integer number (210517352796).

Almost surely, 2^421034705591 is an apocalyptic number.

421034705591 is a deficient number, since it is larger than the sum of its proper divisors (1).

421034705591 is an equidigital number, since it uses as much as digits as its factorization.

421034705591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 421034705591 in words is "four hundred twenty-one billion, thirty-four million, seven hundred five thousand, five hundred ninety-one".