8615891 has 2 divisors, whose sum is σ = 8615892. Its totient is φ = 8615890.

The previous prime is 8615881. The next prime is 8615917. The reversal of 8615891 is 1985168.

8615891 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 8615891 - 2¹⁰ = 8614867 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8615881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4307945 + 4307946.

It is an arithmetic number, because the mean of its divisors is an integer number (4307946).

Almost surely, 2^8615891 is an apocalyptic number.

8615891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8615891 is an equidigital number, since it uses as much as digits as its factorization.

8615891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 38.

The square root of 8615891 is about 2935.2838022924. The cubic root of 8615891 is about 205.0060755685.

The spelling of 8615891 in words is "eight million, six hundred fifteen thousand, eight hundred ninety-one".