7489809 has 12 divisors (see below), whose sum is σ = 11455236. Its totient is φ = 4699392.

The previous prime is 7489787. The next prime is 7489829. The reversal of 7489809 is 9089847.

It can be written as a sum of positive squares in 2 ways, for example, as 4717584 + 2772225 = 2172^2 + 1665^2 .

It is not a de Polignac number, because 7489809 - 2⁷ = 7489681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7489829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24324 + ... + 24629.

It is an arithmetic number, because the mean of its divisors is an integer number (954603).

Almost surely, 2^7489809 is an apocalyptic number.

It is an amenable number.

7489809 is a deficient number, since it is larger than the sum of its proper divisors (3965427).

7489809 is a wasteful number, since it uses less digits than its factorization.

7489809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48976 (or 48973 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 7489809 is about 2736.7515415178. The cubic root of 7489809 is about 195.6546831691.

The spelling of 7489809 in words is "seven million, four hundred eighty-nine thousand, eight hundred nine".