9994196987 has 4 divisors (see below), whose sum is σ = 10032198000. Its totient is φ = 9956195976.

The previous prime is 9994196951. The next prime is 9994196999. The reversal of 9994196987 is 7896914999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9994196987 - 2⁸ = 9994196731 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 9994196987.

It is not an unprimeable number, because it can be changed into a prime (9994196087) 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, 19000112 + ... + 19000637.

It is an arithmetic number, because the mean of its divisors is an integer number (2508049500).

Almost surely, 2^9994196987 is an apocalyptic number.

9994196987 is a deficient number, since it is larger than the sum of its proper divisors (38001013).

9994196987 is a wasteful number, since it uses less digits than its factorization.

9994196987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38001012.

The product of its digits is 79361856, while the sum is 71.

The square root of 9994196987 is about 99970.9807244082. The cubic root of 9994196987 is about 2154.0178689771.

The spelling of 9994196987 in words is "nine billion, nine hundred ninety-four million, one hundred ninety-six thousand, nine hundred eighty-seven".