7320689 has 4 divisors (see below), whose sum is σ = 7334256. Its totient is φ = 7307124.

The previous prime is 7320679. The next prime is 7320697. The reversal of 7320689 is 9860237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7320689 - 2¹² = 7316593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7320679) 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, 5939 + ... + 7064.

It is an arithmetic number, because the mean of its divisors is an integer number (1833564).

Almost surely, 2^7320689 is an apocalyptic number.

It is an amenable number.

7320689 is a deficient number, since it is larger than the sum of its proper divisors (13567).

7320689 is a wasteful number, since it uses less digits than its factorization.

7320689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13566.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 7320689 is about 2705.6771795615. The cubic root of 7320689 is about 194.1708294424.

The spelling of 7320689 in words is "seven million, three hundred twenty thousand, six hundred eighty-nine".