8231491 has 2 divisors, whose sum is σ = 8231492. Its totient is φ = 8231490.

The previous prime is 8231479. The next prime is 8231507. The reversal of 8231491 is 1941328.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8231491 - 2⁵ = 8231459 is a prime.

It is not a weakly prime, because it can be changed into another prime (8231411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4115745 + 4115746.

It is an arithmetic number, because the mean of its divisors is an integer number (4115746).

Almost surely, 2^8231491 is an apocalyptic number.

8231491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8231491 is an equidigital number, since it uses as much as digits as its factorization.

8231491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 8231491 is about 2869.0575107516. The cubic root of 8231491 is about 201.9107781641.

The spelling of 8231491 in words is "eight million, two hundred thirty-one thousand, four hundred ninety-one".