8133491 has 4 divisors (see below), whose sum is σ = 8306592. Its totient is φ = 7960392.

The previous prime is 8133481. The next prime is 8133511. The reversal of 8133491 is 1943318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8133491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8133431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86480 + ... + 86573.

It is an arithmetic number, because the mean of its divisors is an integer number (2076648).

Almost surely, 2^8133491 is an apocalyptic number.

8133491 is a deficient number, since it is larger than the sum of its proper divisors (173101).

8133491 is a wasteful number, since it uses less digits than its factorization.

8133491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173100.

The product of its digits is 2592, while the sum is 29.

The square root of 8133491 is about 2851.9275937513. The cubic root of 8133491 is about 201.1062942817.

The spelling of 8133491 in words is "eight million, one hundred thirty-three thousand, four hundred ninety-one".