7721089 has 4 divisors (see below), whose sum is σ = 7748656. Its totient is φ = 7693524.

The previous prime is 7721071. The next prime is 7721101. The reversal of 7721089 is 9801277.

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 7721089 - 2⁵ = 7721057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7721029) 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, 13359 + ... + 13924.

It is an arithmetic number, because the mean of its divisors is an integer number (1937164).

Almost surely, 2^7721089 is an apocalyptic number.

It is an amenable number.

7721089 is a deficient number, since it is larger than the sum of its proper divisors (27567).

7721089 is a wasteful number, since it uses less digits than its factorization.

7721089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27566.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 7721089 is about 2778.6847608176. The cubic root of 7721089 is about 197.6481951344.

The spelling of 7721089 in words is "seven million, seven hundred twenty-one thousand, eighty-nine".