993247917 has 4 divisors (see below), whose sum is σ = 1324330560. Its totient is φ = 662165276.

The previous prime is 993247907. The next prime is 993247979. The reversal of 993247917 is 719742399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 993247917 - 2⁴ = 993247901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 993247917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993247907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165541317 + ... + 165541322.

It is an arithmetic number, because the mean of its divisors is an integer number (331082640).

Almost surely, 2^993247917 is an apocalyptic number.

It is an amenable number.

993247917 is a deficient number, since it is larger than the sum of its proper divisors (331082643).

993247917 is a wasteful number, since it uses less digits than its factorization.

993247917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331082642.

The product of its digits is 857304, while the sum is 51.

The square root of 993247917 is about 31515.8359717777. The cubic root of 993247917 is about 997.7442209538.

The spelling of 993247917 in words is "nine hundred ninety-three million, two hundred forty-seven thousand, nine hundred seventeen".