994187908287 has 32 divisors (see below), whose sum is σ = 1683425103360. Its totient is φ = 568058780160.

The previous prime is 994187908177. The next prime is 994187908289. The reversal of 994187908287 is 782809781499.

It is not a de Polignac number, because 994187908287 - 2⁷ = 994187908159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994187908289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2051103 + ... + 2489055.

It is an arithmetic number, because the mean of its divisors is an integer number (52607034480).

Almost surely, 2^994187908287 is an apocalyptic number.

994187908287 is a deficient number, since it is larger than the sum of its proper divisors (689237195073).

994187908287 is a wasteful number, since it uses less digits than its factorization.

994187908287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449980 (or 449974 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 72.

The spelling of 994187908287 in words is "nine hundred ninety-four billion, one hundred eighty-seven million, nine hundred eight thousand, two hundred eighty-seven".