7664849 has 2 divisors, whose sum is σ = 7664850. Its totient is φ = 7664848.

The previous prime is 7664821. The next prime is 7664851. The reversal of 7664849 is 9484667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7661824 + 3025 = 2768^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 7664849 - 2¹² = 7660753 is a prime.

Together with 7664851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7664249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832424 + 3832425.

It is an arithmetic number, because the mean of its divisors is an integer number (3832425).

Almost surely, 2^7664849 is an apocalyptic number.

It is an amenable number.

7664849 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664849 is an equidigital number, since it uses as much as digits as its factorization.

7664849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 7664849 is about 2768.5463694871. The cubic root of 7664849 is about 197.1671389411.

The spelling of 7664849 in words is "seven million, six hundred sixty-four thousand, eight hundred forty-nine".