994332643 has 4 divisors (see below), whose sum is σ = 1046665960. Its totient is φ = 941999328.

The previous prime is 994332641. The next prime is 994332659. The reversal of 994332643 is 346233499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346233499 = 61 ⋅5675959.

It is not a de Polignac number, because 994332643 - 2¹ = 994332641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 994332643.

It is not an unprimeable number, because it can be changed into a prime (994332641) 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, 26166630 + ... + 26166667.

It is an arithmetic number, because the mean of its divisors is an integer number (261666490).

Almost surely, 2^994332643 is an apocalyptic number.

994332643 is a deficient number, since it is larger than the sum of its proper divisors (52333317).

994332643 is a wasteful number, since it uses less digits than its factorization.

994332643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52333316.

The product of its digits is 419904, while the sum is 43.

The square root of 994332643 is about 31533.0404972308. The cubic root of 994332643 is about 998.1073009504.

The spelling of 994332643 in words is "nine hundred ninety-four million, three hundred thirty-two thousand, six hundred forty-three".