7782449 has 2 divisors, whose sum is σ = 7782450. Its totient is φ = 7782448.

The previous prime is 7782443. The next prime is 7782451. The reversal of 7782449 is 9442877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7118224 + 664225 = 2668^2 + 815^2 .

It is an emirp because it is prime and its reverse (9442877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7782449 - 2¹⁶ = 7716913 is a prime.

Together with 7782451, 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 (7782443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3891224 + 3891225.

It is an arithmetic number, because the mean of its divisors is an integer number (3891225).

Almost surely, 2^7782449 is an apocalyptic number.

It is an amenable number.

7782449 is a deficient number, since it is larger than the sum of its proper divisors (1).

7782449 is an equidigital number, since it uses as much as digits as its factorization.

7782449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 7782449 is about 2789.7041061733. The cubic root of 7782449 is about 198.1703886497.

The spelling of 7782449 in words is "seven million, seven hundred eighty-two thousand, four hundred forty-nine".