6490391 has 2 divisors, whose sum is σ = 6490392. Its totient is φ = 6490390.

The previous prime is 6490373. The next prime is 6490409. The reversal of 6490391 is 1930946.

6490391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (6490373) and next prime (6490409).

It is a cyclic number.

It is not a de Polignac number, because 6490391 - 2¹⁰ = 6489367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6490321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245195 + 3245196.

It is an arithmetic number, because the mean of its divisors is an integer number (3245196).

Almost surely, 2^6490391 is an apocalyptic number.

6490391 is a deficient number, since it is larger than the sum of its proper divisors (1).

6490391 is an equidigital number, since it uses as much as digits as its factorization.

6490391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 6490391 is about 2547.6245798783. The cubic root of 6490391 is about 186.5335491543.

The spelling of 6490391 in words is "six million, four hundred ninety thousand, three hundred ninety-one".