994991434991 has 4 divisors (see below), whose sum is σ = 997207452000. Its totient is φ = 992775417984.

The previous prime is 994991434981. The next prime is 994991435017. The reversal of 994991434991 is 199434199499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199434199499 = 11909 ⋅16746511.

It is a cyclic number.

It is not a de Polignac number, because 994991434991 - 2¹⁴ = 994991418607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994991434981) 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, 1108007831 + ... + 1108008728.

It is an arithmetic number, because the mean of its divisors is an integer number (249301863000).

Almost surely, 2^994991434991 is an apocalyptic number.

994991434991 is a deficient number, since it is larger than the sum of its proper divisors (2216017009).

994991434991 is a wasteful number, since it uses less digits than its factorization.

994991434991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216017008.

The product of its digits is 102036672, while the sum is 71.

The spelling of 994991434991 in words is "nine hundred ninety-four billion, nine hundred ninety-one million, four hundred thirty-four thousand, nine hundred ninety-one".