7643609 has 2 divisors, whose sum is σ = 7643610. Its totient is φ = 7643608.

The previous prime is 7643593. The next prime is 7643621. The reversal of 7643609 is 9063467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4528384 + 3115225 = 2128^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 7643609 - 2⁴ = 7643593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7648609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821804 + 3821805.

It is an arithmetic number, because the mean of its divisors is an integer number (3821805).

Almost surely, 2^7643609 is an apocalyptic number.

It is an amenable number.

7643609 is a deficient number, since it is larger than the sum of its proper divisors (1).

7643609 is an equidigital number, since it uses as much as digits as its factorization.

7643609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 7643609 is about 2764.7077603248. The cubic root of 7643609 is about 196.9848477098.

The spelling of 7643609 in words is "seven million, six hundred forty-three thousand, six hundred nine".