6891479 has 4 divisors (see below), whose sum is σ = 7875984. Its totient is φ = 5906976.

The previous prime is 6891461. The next prime is 6891487. The reversal of 6891479 is 9741986.

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

It is a cyclic number.

It is not a de Polignac number, because 6891479 - 2¹⁶ = 6825943 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 (6891499) 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, 492242 + ... + 492255.

It is an arithmetic number, because the mean of its divisors is an integer number (1968996).

Almost surely, 2^6891479 is an apocalyptic number.

6891479 is a deficient number, since it is larger than the sum of its proper divisors (984505).

6891479 is an equidigital number, since it uses as much as digits as its factorization.

6891479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984504.

The product of its digits is 108864, while the sum is 44.

The square root of 6891479 is about 2625.1626616269. The cubic root of 6891479 is about 190.2994263081.

The spelling of 6891479 in words is "six million, eight hundred ninety-one thousand, four hundred seventy-nine".