7989621 has 8 divisors (see below), whose sum is σ = 10708800. Its totient is φ = 5298432.

The previous prime is 7989617. The next prime is 7989637. The reversal of 7989621 is 1269897.

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

It is not a de Polignac number, because 7989621 - 2² = 7989617 is a prime.

7989621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7989601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6321 + ... + 7478.

It is an arithmetic number, because the mean of its divisors is an integer number (1338600).

Almost surely, 2^7989621 is an apocalyptic number.

It is an amenable number.

7989621 is a deficient number, since it is larger than the sum of its proper divisors (2719179).

7989621 is a wasteful number, since it uses less digits than its factorization.

7989621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13995.

The product of its digits is 54432, while the sum is 42.

The square root of 7989621 is about 2826.5917639447. The cubic root of 7989621 is about 199.9134709023.

The spelling of 7989621 in words is "seven million, nine hundred eighty-nine thousand, six hundred twenty-one".