7744489 has 2 divisors, whose sum is σ = 7744490. Its totient is φ = 7744488.

The previous prime is 7744487. The next prime is 7744501. The reversal of 7744489 is 9844477.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5798464 + 1946025 = 2408^2 + 1395^2 .

It is an emirp because it is prime and its reverse (9844477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7744489 - 2¹ = 7744487 is a prime.

It is a super-2 number, since 2×7744489² = 119954219742242, which contains 22 as substring.

Together with 7744487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7744487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3872244 + 3872245.

It is an arithmetic number, because the mean of its divisors is an integer number (3872245).

Almost surely, 2^7744489 is an apocalyptic number.

It is an amenable number.

7744489 is a deficient number, since it is larger than the sum of its proper divisors (1).

7744489 is an equidigital number, since it uses as much as digits as its factorization.

7744489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 43.

The square root of 7744489 is about 2782.8922005712. The cubic root of 7744489 is about 197.8476619618.

It can be divided in two parts, 77 and 44489, that multiplied together give a triangular number (3425653 = T₂₆₁₇).

The spelling of 7744489 in words is "seven million, seven hundred forty-four thousand, four hundred eighty-nine".