994289993 has 4 divisors (see below), whose sum is σ = 1000037508. Its totient is φ = 988542480.

The previous prime is 994289957. The next prime is 994290013. The reversal of 994289993 is 399982499.

994289993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 399982499 = 7 ⋅57140357.

It can be written as a sum of positive squares in 2 ways, for example, as 782209024 + 212080969 = 27968^2 + 14563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994289993 is a prime.

It is a super-2 number, since 2×994289993² = 1977225180359880098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994289953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2873498 + ... + 2873843.

It is an arithmetic number, because the mean of its divisors is an integer number (250009377).

Almost surely, 2^994289993 is an apocalyptic number.

It is an amenable number.

994289993 is a deficient number, since it is larger than the sum of its proper divisors (5747515).

994289993 is a wasteful number, since it uses less digits than its factorization.

994289993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5747514.

The product of its digits is 11337408, while the sum is 62.

The square root of 994289993 is about 31532.3642151996. The cubic root of 994289993 is about 998.0930301108.

The spelling of 994289993 in words is "nine hundred ninety-four million, two hundred eighty-nine thousand, nine hundred ninety-three".