8143491 has 8 divisors (see below), whose sum is σ = 10881360. Its totient is φ = 5417312.

The previous prime is 8143463. The next prime is 8143501. The reversal of 8143491 is 1943418.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8143491 - 2⁶ = 8143427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8153491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140 + ... + 4193.

It is an arithmetic number, because the mean of its divisors is an integer number (1360170).

Almost surely, 2^8143491 is an apocalyptic number.

8143491 is a deficient number, since it is larger than the sum of its proper divisors (2737869).

8143491 is a wasteful number, since it uses less digits than its factorization.

8143491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845.

The product of its digits is 3456, while the sum is 30.

The square root of 8143491 is about 2853.6802553895. The cubic root of 8143491 is about 201.1886795418.

The spelling of 8143491 in words is "eight million, one hundred forty-three thousand, four hundred ninety-one".