7643413 has 2 divisors, whose sum is σ = 7643414. Its totient is φ = 7643412.

The previous prime is 7643411. The next prime is 7643417. The reversal of 7643413 is 3143467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7006609 + 636804 = 2647^2 + 798^2 .

It is an emirp because it is prime and its reverse (3143467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7643413 - 2¹ = 7643411 is a prime.

Together with 7643411, it forms a pair of twin primes.

It is an Ulam number.

7643413 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7643411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821706 + 3821707.

It is an arithmetic number, because the mean of its divisors is an integer number (3821707).

Almost surely, 2^7643413 is an apocalyptic number.

It is an amenable number.

7643413 is a deficient number, since it is larger than the sum of its proper divisors (1).

7643413 is an equidigital number, since it uses as much as digits as its factorization.

7643413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 7643413 is about 2764.6723133131. The cubic root of 7643413 is about 196.9831639782.

The spelling of 7643413 in words is "seven million, six hundred forty-three thousand, four hundred thirteen".