8615491 has 2 divisors, whose sum is σ = 8615492. Its totient is φ = 8615490.

The previous prime is 8615479. The next prime is 8615507. The reversal of 8615491 is 1945168.

8615491 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 8615491 - 2⁹ = 8614979 is a prime.

It is not a weakly prime, because it can be changed into another prime (8615461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4307745 + 4307746.

It is an arithmetic number, because the mean of its divisors is an integer number (4307746).

Almost surely, 2^8615491 is an apocalyptic number.

8615491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8615491 is an equidigital number, since it uses as much as digits as its factorization.

8615491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 8615491 is about 2935.2156649895. The cubic root of 8615491 is about 205.0029029928.

The spelling of 8615491 in words is "eight million, six hundred fifteen thousand, four hundred ninety-one".