6413891 has 8 divisors (see below), whose sum is σ = 7051968. Its totient is φ = 5785000.

The previous prime is 6413873. The next prime is 6413899. The reversal of 6413891 is 1983146.

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 a de Polignac number, because none of the positive numbers 2^k-6413891 is a prime.

It is a super-2 number, since 2×6413891² = 82275995519762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6413899) 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, 785 + ... + 3666.

It is an arithmetic number, because the mean of its divisors is an integer number (881496).

Almost surely, 2^6413891 is an apocalyptic number.

6413891 is a deficient number, since it is larger than the sum of its proper divisors (638077).

6413891 is a wasteful number, since it uses less digits than its factorization.

6413891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593.

The product of its digits is 5184, while the sum is 32.

The square root of 6413891 is about 2532.5660899570. The cubic root of 6413891 is about 185.7977819252.

The spelling of 6413891 in words is "six million, four hundred thirteen thousand, eight hundred ninety-one".