6440933 has 2 divisors, whose sum is σ = 6440934. Its totient is φ = 6440932.

The previous prime is 6440893. The next prime is 6440939. The reversal of 6440933 is 3390446.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4318084 + 2122849 = 2078^2 + 1457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6440933 is a prime.

It is a Chen prime.

It is equal to p₄₄₀₉₉₃ and since 6440933 and 440993 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 6440896 and 6440905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6440939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220466 + 3220467.

It is an arithmetic number, because the mean of its divisors is an integer number (3220467).

Almost surely, 2^6440933 is an apocalyptic number.

It is an amenable number.

6440933 is a deficient number, since it is larger than the sum of its proper divisors (1).

6440933 is an equidigital number, since it uses as much as digits as its factorization.

6440933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 6440933 is about 2537.8993281846. The cubic root of 6440933 is about 186.0585336261.

The spelling of 6440933 in words is "six million, four hundred forty thousand, nine hundred thirty-three".