6491437 has 4 divisors (see below), whose sum is σ = 6597916. Its totient is φ = 6384960.

The previous prime is 6491417. The next prime is 6491449. The reversal of 6491437 is 7341946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7341946 = 2 ⋅3670973.

It can be written as a sum of positive squares in 2 ways, for example, as 2223081 + 4268356 = 1491^2 + 2066^2 .

It is a cyclic number.

It is not a de Polignac number, because 6491437 - 2¹¹ = 6489389 is a prime.

It is a Duffinian number.

6491437 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53148 + ... + 53269.

It is an arithmetic number, because the mean of its divisors is an integer number (1649479).

Almost surely, 2^6491437 is an apocalyptic number.

It is an amenable number.

6491437 is a deficient number, since it is larger than the sum of its proper divisors (106479).

6491437 is a wasteful number, since it uses less digits than its factorization.

6491437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106478.

The product of its digits is 18144, while the sum is 34.

The square root of 6491437 is about 2547.8298608816. The cubic root of 6491437 is about 186.5435692806.

The spelling of 6491437 in words is "six million, four hundred ninety-one thousand, four hundred thirty-seven".