8146991 has 16 divisors (see below), whose sum is σ = 9085440. Its totient is φ = 7270560.

The previous prime is 8146969. The next prime is 8147039. The reversal of 8146991 is 1996418.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8146991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8146091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44921 + ... + 45101.

It is an arithmetic number, because the mean of its divisors is an integer number (567840).

Almost surely, 2^8146991 is an apocalyptic number.

8146991 is a deficient number, since it is larger than the sum of its proper divisors (938449).

8146991 is a wasteful number, since it uses less digits than its factorization.

8146991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its digits is 15552, while the sum is 38.

The square root of 8146991 is about 2854.2934327080. The cubic root of 8146991 is about 201.2174984485.

The spelling of 8146991 in words is "eight million, one hundred forty-six thousand, nine hundred ninety-one".