7489409 has 4 divisors (see below), whose sum is σ = 7499604. Its totient is φ = 7479216.

The previous prime is 7489399. The next prime is 7489423. The reversal of 7489409 is 9049847.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1254400 + 6235009 = 1120^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 7489409 - 2⁴ = 7489393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7489609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3902 + ... + 5495.

It is an arithmetic number, because the mean of its divisors is an integer number (1874901).

Almost surely, 2^7489409 is an apocalyptic number.

It is an amenable number.

7489409 is a deficient number, since it is larger than the sum of its proper divisors (10195).

7489409 is an equidigital number, since it uses as much as digits as its factorization.

7489409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10194.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 7489409 is about 2736.6784612007. The cubic root of 7489409 is about 195.6512000689.

The spelling of 7489409 in words is "seven million, four hundred eighty-nine thousand, four hundred nine".