7909993 has 8 divisors (see below), whose sum is σ = 9735488. Its totient is φ = 6258384.

The previous prime is 7909987. The next prime is 7910003. The reversal of 7909993 is 3999097.

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 7909993 - 2¹⁷ = 7778921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7909903) 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, 43371 + ... + 43552.

It is an arithmetic number, because the mean of its divisors is an integer number (1216936).

Almost surely, 2^7909993 is an apocalyptic number.

It is an amenable number.

7909993 is a deficient number, since it is larger than the sum of its proper divisors (1825495).

7909993 is a wasteful number, since it uses less digits than its factorization.

7909993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86943.

The product of its (nonzero) digits is 137781, while the sum is 46.

The square root of 7909993 is about 2812.4709776280. The cubic root of 7909993 is about 199.2471110139.

The spelling of 7909993 in words is "seven million, nine hundred nine thousand, nine hundred ninety-three".