6890491 has 4 divisors (see below), whose sum is σ = 7295832. Its totient is φ = 6485152.

The previous prime is 6890453. The next prime is 6890497. The reversal of 6890491 is 1940986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1940986 = 2 ⋅970493.

It is a cyclic number.

It is not a de Polignac number, because 6890491 - 2¹⁹ = 6366203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6890491.

It is not an unprimeable number, because it can be changed into a prime (6890497) 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, 202645 + ... + 202678.

It is an arithmetic number, because the mean of its divisors is an integer number (1823958).

Almost surely, 2^6890491 is an apocalyptic number.

6890491 is a deficient number, since it is larger than the sum of its proper divisors (405341).

6890491 is a wasteful number, since it uses less digits than its factorization.

6890491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405340.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 6890491 is about 2624.9744760664. The cubic root of 6890491 is about 190.2903317524.

It can be divided in two parts, 6890 and 491, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 6890491 in words is "six million, eight hundred ninety thousand, four hundred ninety-one".