7982009 has 8 divisors (see below), whose sum is σ = 9142848. Its totient is φ = 6826320.

The previous prime is 7981999. The next prime is 7982017. The reversal of 7982009 is 9002897.

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 7982009 - 2¹⁶ = 7916473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7982009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7982059) 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, 2999 + ... + 4995.

It is an arithmetic number, because the mean of its divisors is an integer number (1142856).

Almost surely, 2^7982009 is an apocalyptic number.

It is an amenable number.

7982009 is a deficient number, since it is larger than the sum of its proper divisors (1160839).

7982009 is a wasteful number, since it uses less digits than its factorization.

7982009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575.

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

The square root of 7982009 is about 2825.2449451331. The cubic root of 7982009 is about 199.8499624718.

The spelling of 7982009 in words is "seven million, nine hundred eighty-two thousand, nine".