7986649 has 8 divisors (see below), whose sum is σ = 8782848. Its totient is φ = 7202160.

The previous prime is 7986647. The next prime is 7986659. The reversal of 7986649 is 9466897.

7986649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 7986649 - 2¹ = 7986647 is a prime.

It is a d-powerful number, because it can be written as 7⁷ + 9³ + 8⁷ + 6⁴ + 6⁷ + 4⁵ + 9⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7986647) 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, 1462 + ... + 4255.

It is an arithmetic number, because the mean of its divisors is an integer number (1097856).

Almost surely, 2^7986649 is an apocalyptic number.

It is an amenable number.

7986649 is a deficient number, since it is larger than the sum of its proper divisors (796199).

7986649 is a wasteful number, since it uses less digits than its factorization.

7986649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5855.

The product of its digits is 653184, while the sum is 49.

The square root of 7986649 is about 2826.0659935677. The cubic root of 7986649 is about 199.8886797171. Note that the first 3 decimals are identical.

It can be divided in two parts, 798 and 6649, that added together give a palindrome (7447).

The spelling of 7986649 in words is "seven million, nine hundred eighty-six thousand, six hundred forty-nine".