7646621 has 2 divisors, whose sum is σ = 7646622. Its totient is φ = 7646620.

The previous prime is 7646581. The next prime is 7646641. The reversal of 7646621 is 1266467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4622500 + 3024121 = 2150^2 + 1739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7646621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7646641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3823310 + 3823311.

It is an arithmetic number, because the mean of its divisors is an integer number (3823311).

Almost surely, 2^7646621 is an apocalyptic number.

It is an amenable number.

7646621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7646621 is an equidigital number, since it uses as much as digits as its factorization.

7646621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 7646621 is about 2765.2524297069. The cubic root of 7646621 is about 197.0107185799.

The spelling of 7646621 in words is "seven million, six hundred forty-six thousand, six hundred twenty-one".