7649561 has 2 divisors, whose sum is σ = 7649562. Its totient is φ = 7649560.

The previous prime is 7649557. The next prime is 7649567. The reversal of 7649561 is 1659467.

7649561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7590025 + 59536 = 2755^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 7649561 - 2² = 7649557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7649567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3824780 + 3824781.

It is an arithmetic number, because the mean of its divisors is an integer number (3824781).

Almost surely, 2^7649561 is an apocalyptic number.

It is an amenable number.

7649561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7649561 is an equidigital number, since it uses as much as digits as its factorization.

7649561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 7649561 is about 2765.7839756568. The cubic root of 7649561 is about 197.0359644715.

The spelling of 7649561 in words is "seven million, six hundred forty-nine thousand, five hundred sixty-one".