6491489 has 4 divisors (see below), whose sum is σ = 6649860. Its totient is φ = 6333120.

The previous prime is 6491477. The next prime is 6491533. The reversal of 6491489 is 9841946.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3179089 + 3312400 = 1783^2 + 1820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6491489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 158329 = 6491489 / (6 + 4 + 9 + 1 + 4 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6491449) 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, 79124 + ... + 79205.

It is an arithmetic number, because the mean of its divisors is an integer number (1662465).

Almost surely, 2^6491489 is an apocalyptic number.

It is an amenable number.

6491489 is a deficient number, since it is larger than the sum of its proper divisors (158371).

6491489 is a wasteful number, since it uses less digits than its factorization.

6491489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158370.

The product of its digits is 62208, while the sum is 41.

The square root of 6491489 is about 2547.8400656242. The cubic root of 6491489 is about 186.5440673850.

The spelling of 6491489 in words is "six million, four hundred ninety-one thousand, four hundred eighty-nine".