6391037 has 4 divisors (see below), whose sum is σ = 6411516. Its totient is φ = 6370560.

The previous prime is 6391009. The next prime is 6391043. The reversal of 6391037 is 7301936.

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 1976836 + 4414201 = 1406^2 + 2101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6391037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391537) 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, 9764 + ... + 10397.

It is an arithmetic number, because the mean of its divisors is an integer number (1602879).

Almost surely, 2^6391037 is an apocalyptic number.

It is an amenable number.

6391037 is a deficient number, since it is larger than the sum of its proper divisors (20479).

6391037 is a wasteful number, since it uses less digits than its factorization.

6391037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20478.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 6391037 is about 2528.0500390617. The cubic root of 6391037 is about 185.5768408510.

The spelling of 6391037 in words is "six million, three hundred ninety-one thousand, thirty-seven".