11173198987 has 8 divisors (see below), whose sum is σ = 11520904752. Its totient is φ = 10827900000.

The previous prime is 11173198931. The next prime is 11173198997. The reversal of 11173198987 is 78989137111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11173198987 - 2⁷ = 11173198859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11173198997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592264 + ... + 610837.

It is an arithmetic number, because the mean of its divisors is an integer number (1440113094).

Almost surely, 2^11173198987 is an apocalyptic number.

11173198987 is a deficient number, since it is larger than the sum of its proper divisors (347705765).

11173198987 is a wasteful number, since it uses less digits than its factorization.

11173198987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203389.

The product of its digits is 762048, while the sum is 55.

The spelling of 11173198987 in words is "eleven billion, one hundred seventy-three million, one hundred ninety-eight thousand, nine hundred eighty-seven".