994021923087 has 16 divisors (see below), whose sum is σ = 1506872167680. Its totient is φ = 647270088696.

The previous prime is 994021923077. The next prime is 994021923091. The reversal of 994021923087 is 780329120499.

It is not a de Polignac number, because 994021923087 - 2¹⁰ = 994021922063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994021923007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428087523 + ... + 428089844.

It is an arithmetic number, because the mean of its divisors is an integer number (94179510480).

Almost surely, 2^994021923087 is an apocalyptic number.

994021923087 is a deficient number, since it is larger than the sum of its proper divisors (512850244593).

994021923087 is a wasteful number, since it uses less digits than its factorization.

994021923087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856177419 (or 856177413 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 994021923087 in words is "nine hundred ninety-four billion, twenty-one million, nine hundred twenty-three thousand, eighty-seven".