7659921 has 8 divisors (see below), whose sum is σ = 10272960. Its totient is φ = 5076752.

The previous prime is 7659917. The next prime is 7659923. The reversal of 7659921 is 1299567.

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 7659921 - 2² = 7659917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7659921.

It is not an unprimeable number, because it can be changed into a prime (7659923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6861 + ... + 7898.

It is an arithmetic number, because the mean of its divisors is an integer number (1284120).

Almost surely, 2^7659921 is an apocalyptic number.

It is an amenable number.

7659921 is a deficient number, since it is larger than the sum of its proper divisors (2613039).

7659921 is a wasteful number, since it uses less digits than its factorization.

7659921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14935.

The product of its digits is 34020, while the sum is 39.

The square root of 7659921 is about 2767.6562286527. The cubic root of 7659921 is about 197.1248746613.

The spelling of 7659921 in words is "seven million, six hundred fifty-nine thousand, nine hundred twenty-one".