7945989 has 8 divisors (see below), whose sum is σ = 10654560. Its totient is φ = 5267376.

The previous prime is 7945981. The next prime is 7946023. The reversal of 7945989 is 9895497.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7945989 - 2³ = 7945981 is a prime.

It is a Curzon number.

7945989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7945981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6862 + ... + 7935.

It is an arithmetic number, because the mean of its divisors is an integer number (1331820).

Almost surely, 2^7945989 is an apocalyptic number.

It is an amenable number.

7945989 is a deficient number, since it is larger than the sum of its proper divisors (2708571).

7945989 is a wasteful number, since it uses less digits than its factorization.

7945989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14979.

The product of its digits is 816480, while the sum is 51.

The square root of 7945989 is about 2818.8630686857. The cubic root of 7945989 is about 199.5488916044.

The spelling of 7945989 in words is "seven million, nine hundred forty-five thousand, nine hundred eighty-nine".