6405401213 has 2 divisors, whose sum is σ = 6405401214. Its totient is φ = 6405401212.

The previous prime is 6405401209. The next prime is 6405401237. The reversal of 6405401213 is 3121045046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5843379364 + 562021849 = 76442^2 + 23707^2 .

It is a cyclic number.

It is not a de Polignac number, because 6405401213 - 2² = 6405401209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6405401263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202700606 + 3202700607.

It is an arithmetic number, because the mean of its divisors is an integer number (3202700607).

Almost surely, 2^6405401213 is an apocalyptic number.

It is an amenable number.

6405401213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6405401213 is an equidigital number, since it uses as much as digits as its factorization.

6405401213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6405401213 is about 80033.7504619145. The cubic root of 6405401213 is about 1857.1576826258.

Adding to 6405401213 its reverse (3121045046), we get a palindrome (9526446259).

The spelling of 6405401213 in words is "six billion, four hundred five million, four hundred one thousand, two hundred thirteen".