5656691 has 2 divisors, whose sum is σ = 5656692. Its totient is φ = 5656690.

The previous prime is 5656649. The next prime is 5656723. The reversal of 5656691 is 1966565.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5656691 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (5656621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828345 + 2828346.

It is an arithmetic number, because the mean of its divisors is an integer number (2828346).

Almost surely, 2^5656691 is an apocalyptic number.

5656691 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656691 is an equidigital number, since it uses as much as digits as its factorization.

5656691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 38.

The square root of 5656691 is about 2378.3799107796. The cubic root of 5656691 is about 178.1780295993.

The spelling of 5656691 in words is "five million, six hundred fifty-six thousand, six hundred ninety-one".