6401933 has 2 divisors, whose sum is σ = 6401934. Its totient is φ = 6401932.

The previous prime is 6401929. The next prime is 6401939. The reversal of 6401933 is 3391046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6086089 + 315844 = 2467^2 + 562^2 .

It is a cyclic number.

It is not a de Polignac number, because 6401933 - 2² = 6401929 is a prime.

It is a super-2 number, since 2×6401933² = 81969492272978, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200966 + 3200967.

It is an arithmetic number, because the mean of its divisors is an integer number (3200967).

Almost surely, 2^6401933 is an apocalyptic number.

It is an amenable number.

6401933 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401933 is an equidigital number, since it uses as much as digits as its factorization.

6401933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 6401933 is about 2530.2041419617. The cubic root of 6401933 is about 185.6822435280.

Adding to 6401933 its reverse (3391046), we get a palindrome (9792979).

The spelling of 6401933 in words is "six million, four hundred one thousand, nine hundred thirty-three".