6490091 has 4 divisors (see below), whose sum is σ = 6495384. Its totient is φ = 6484800.

The previous prime is 6490079. The next prime is 6490093. The reversal of 6490091 is 1900946.

6490091 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1900946 = 2 ⋅950473.

It is a cyclic number.

It is not a de Polignac number, because 6490091 - 2⁶ = 6490027 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6490093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251 + ... + 3611.

It is an arithmetic number, because the mean of its divisors is an integer number (1623846).

Almost surely, 2^6490091 is an apocalyptic number.

6490091 is a deficient number, since it is larger than the sum of its proper divisors (5293).

6490091 is a wasteful number, since it uses less digits than its factorization.

6490091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5292.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 6490091 is about 2547.5657008211. The cubic root of 6490091 is about 186.5306751145.

The spelling of 6490091 in words is "six million, four hundred ninety thousand, ninety-one".