6440937 has 4 divisors (see below), whose sum is σ = 8587920. Its totient is φ = 4293956.

The previous prime is 6440933. The next prime is 6440939. The reversal of 6440937 is 7390446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6440937 - 2² = 6440933 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 6440898 and 6440907.

It is not an unprimeable number, because it can be changed into a prime (6440933) 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, 1073487 + ... + 1073492.

It is an arithmetic number, because the mean of its divisors is an integer number (2146980).

Almost surely, 2^6440937 is an apocalyptic number.

It is an amenable number.

6440937 is a deficient number, since it is larger than the sum of its proper divisors (2146983).

6440937 is a wasteful number, since it uses less digits than its factorization.

6440937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146982.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 6440937 is about 2537.9001162378. The cubic root of 6440937 is about 186.0585721420.

It can be divided in two parts, 64409 and 37, that added together give a palindrome (64446).

The spelling of 6440937 in words is "six million, four hundred forty thousand, nine hundred thirty-seven".