34131421991 has 2 divisors, whose sum is σ = 34131421992. Its totient is φ = 34131421990.

The previous prime is 34131421981. The next prime is 34131422029. The reversal of 34131421991 is 19912413143.

It is an a-pointer prime, because the next prime (34131422029) can be obtained adding 34131421991 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 34131421991 - 2³⁰ = 33057680167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34131421981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17065710995 + 17065710996.

It is an arithmetic number, because the mean of its divisors is an integer number (17065710996).

Almost surely, 2^34131421991 is an apocalyptic number.

34131421991 is a deficient number, since it is larger than the sum of its proper divisors (1).

34131421991 is an equidigital number, since it uses as much as digits as its factorization.

34131421991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The spelling of 34131421991 in words is "thirty-four billion, one hundred thirty-one million, four hundred twenty-one thousand, nine hundred ninety-one".