8001491 has 2 divisors, whose sum is σ = 8001492. Its totient is φ = 8001490.

The previous prime is 8001359. The next prime is 8001517. The reversal of 8001491 is 1941008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8001491 - 2²² = 3807187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8001991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000745 + 4000746.

It is an arithmetic number, because the mean of its divisors is an integer number (4000746).

Almost surely, 2^8001491 is an apocalyptic number.

8001491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8001491 is an equidigital number, since it uses as much as digits as its factorization.

8001491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 8001491 is about 2828.6906865191. The cubic root of 8001491 is about 200.0124242282.

Adding to 8001491 its reverse (1941008), we get a palindrome (9942499).

The spelling of 8001491 in words is "eight million, one thousand, four hundred ninety-one".