7312889 has 4 divisors (see below), whose sum is σ = 7320180. Its totient is φ = 7305600.

The previous prime is 7312867. The next prime is 7312909. The reversal of 7312889 is 9882137.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9882137 = 1129 ⋅8753.

It can be written as a sum of positive squares in 2 ways, for example, as 511225 + 6801664 = 715^2 + 2608^2 .

It is a cyclic number.

It is not a de Polignac number, because 7312889 - 2⁸ = 7312633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7312819) 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, 1844 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (1830045).

Almost surely, 2^7312889 is an apocalyptic number.

It is an amenable number.

7312889 is a deficient number, since it is larger than the sum of its proper divisors (7291).

7312889 is a wasteful number, since it uses less digits than its factorization.

7312889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7290.

The product of its digits is 24192, while the sum is 38.

The square root of 7312889 is about 2704.2353817669. The cubic root of 7312889 is about 194.1018436458.

The spelling of 7312889 in words is "seven million, three hundred twelve thousand, eight hundred eighty-nine".