3421234638391 has 2 divisors, whose sum is σ = 3421234638392. Its totient is φ = 3421234638390.

The previous prime is 3421234638389. The next prime is 3421234638401. The reversal of 3421234638391 is 1938364321243.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3421234638391 - 2¹ = 3421234638389 is a prime.

Together with 3421234638389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3421234638301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710617319195 + 1710617319196.

It is an arithmetic number, because the mean of its divisors is an integer number (1710617319196).

Almost surely, 2^{3421234638391} is an apocalyptic number.

3421234638391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3421234638391 is an equidigital number, since it uses as much as digits as its factorization.

3421234638391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 49.

The spelling of 3421234638391 in words is "three trillion, four hundred twenty-one billion, two hundred thirty-four million, six hundred thirty-eight thousand, three hundred ninety-one".