994045993 has 4 divisors (see below), whose sum is σ = 1037265408. Its totient is φ = 950826580.

The previous prime is 994045991. The next prime is 994046003. The reversal of 994045993 is 399540499.

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 994045993 - 2¹ = 994045991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 994045993.

It is not an unprimeable number, because it can be changed into a prime (994045991) 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, 21609673 + ... + 21609718.

It is an arithmetic number, because the mean of its divisors is an integer number (259316352).

Almost surely, 2^994045993 is an apocalyptic number.

It is an amenable number.

994045993 is a deficient number, since it is larger than the sum of its proper divisors (43219415).

994045993 is a wasteful number, since it uses less digits than its factorization.

994045993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43219414.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 994045993 is about 31528.4949371200. The cubic root of 994045993 is about 998.0113790080.

The spelling of 994045993 in words is "nine hundred ninety-four million, forty-five thousand, nine hundred ninety-three".