6490987 has 4 divisors (see below), whose sum is σ = 6507576. Its totient is φ = 6474400.

The previous prime is 6490973. The next prime is 6490999. The reversal of 6490987 is 7890946.

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 6490987 - 2¹¹ = 6488939 is a prime.

It is a Duffinian number.

6490987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6490907) 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, 7693 + ... + 8494.

It is an arithmetic number, because the mean of its divisors is an integer number (1626894).

Almost surely, 2^6490987 is an apocalyptic number.

6490987 is a deficient number, since it is larger than the sum of its proper divisors (16589).

6490987 is a wasteful number, since it uses less digits than its factorization.

6490987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16588.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 6490987 is about 2547.7415489017. The cubic root of 6490987 is about 186.5392586507.

The spelling of 6490987 in words is "six million, four hundred ninety thousand, nine hundred eighty-seven".