7920089 has 4 divisors (see below), whose sum is σ = 7926324. Its totient is φ = 7913856.

The previous prime is 7920071. The next prime is 7920091. The reversal of 7920089 is 9800297.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 4804864 + 3115225 = 2192^2 + 1765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7920089 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7920019) 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, 452 + ... + 4005.

It is an arithmetic number, because the mean of its divisors is an integer number (1981581).

Almost surely, 2^7920089 is an apocalyptic number.

It is an amenable number.

7920089 is a deficient number, since it is larger than the sum of its proper divisors (6235).

7920089 is a wasteful number, since it uses less digits than its factorization.

7920089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 7920089 is about 2814.2652682361. The cubic root of 7920089 is about 199.3318453324.

The spelling of 7920089 in words is "seven million, nine hundred twenty thousand, eighty-nine".