7917993393 has 8 divisors (see below), whose sum is σ = 10563567168. Its totient is φ = 5275540944.

The previous prime is 7917993379. The next prime is 7917993427. The reversal of 7917993393 is 3933997197.

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

It is not a de Polignac number, because 7917993393 - 2⁵ = 7917993361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7917993323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774405 + ... + 784562.

It is an arithmetic number, because the mean of its divisors is an integer number (1320445896).

Almost surely, 2^7917993393 is an apocalyptic number.

It is an amenable number.

7917993393 is a deficient number, since it is larger than the sum of its proper divisors (2645573775).

7917993393 is a wasteful number, since it uses less digits than its factorization.

7917993393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560663.

The product of its digits is 8680203, while the sum is 60.

The square root of 7917993393 is about 88983.1073462823. The cubic root of 7917993393 is about 1993.1426312014.

The spelling of 7917993393 in words is "seven billion, nine hundred seventeen million, nine hundred ninety-three thousand, three hundred ninety-three".