8424131491 has 2 divisors, whose sum is σ = 8424131492. Its totient is φ = 8424131490.

The previous prime is 8424131489. The next prime is 8424131539. The reversal of 8424131491 is 1941314248.

8424131491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8424131491 - 2¹ = 8424131489 is a prime.

Together with 8424131489, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8424131491.

It is not a weakly prime, because it can be changed into another prime (8424131291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212065745 + 4212065746.

It is an arithmetic number, because the mean of its divisors is an integer number (4212065746).

Almost surely, 2^8424131491 is an apocalyptic number.

8424131491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8424131491 is an equidigital number, since it uses as much as digits as its factorization.

8424131491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 8424131491 is about 91783.0675615061. The cubic root of 8424131491 is about 2034.7374525004.

The spelling of 8424131491 in words is "eight billion, four hundred twenty-four million, one hundred thirty-one thousand, four hundred ninety-one".