5664991 has 2 divisors, whose sum is σ = 5664992. Its totient is φ = 5664990.

The previous prime is 5664979. The next prime is 5665013. The reversal of 5664991 is 1994665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5664991 - 2⁹ = 5664479 is a prime.

It is a Chen prime.

5664991 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5664931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832495 + 2832496.

It is an arithmetic number, because the mean of its divisors is an integer number (2832496).

Almost surely, 2^5664991 is an apocalyptic number.

5664991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5664991 is an equidigital number, since it uses as much as digits as its factorization.

5664991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 5664991 is about 2380.1241564255. The cubic root of 5664991 is about 178.2651332270.

The spelling of 5664991 in words is "five million, six hundred sixty-four thousand, nine hundred ninety-one".