421344440791 has 2 divisors, whose sum is σ = 421344440792. Its totient is φ = 421344440790.

The previous prime is 421344440767. The next prime is 421344440807. The reversal of 421344440791 is 197044443124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421344440791 - 2²³ = 421336052183 is a prime.

It is a super-2 number, since 2×421344440791² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421344440191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210672220395 + 210672220396.

It is an arithmetic number, because the mean of its divisors is an integer number (210672220396).

Almost surely, 2^421344440791 is an apocalyptic number.

421344440791 is a deficient number, since it is larger than the sum of its proper divisors (1).

421344440791 is an equidigital number, since it uses as much as digits as its factorization.

421344440791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 421344440791 in words is "four hundred twenty-one billion, three hundred forty-four million, four hundred forty thousand, seven hundred ninety-one".