2117387190983 has 4 divisors (see below), whose sum is σ = 2166628753608. Its totient is φ = 2068145628360.

The previous prime is 2117387190979. The next prime is 2117387190991. The reversal of 2117387190983 is 3890917837112.

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 2117387190983 - 2² = 2117387190979 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 (2117387190953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24620781248 + ... + 24620781333.

It is an arithmetic number, because the mean of its divisors is an integer number (541657188402).

Almost surely, 2^{2117387190983} is an apocalyptic number.

2117387190983 is a deficient number, since it is larger than the sum of its proper divisors (49241562625).

2117387190983 is an equidigital number, since it uses as much as digits as its factorization.

2117387190983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49241562624.

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 2117387190983 in words is "two trillion, one hundred seventeen billion, three hundred eighty-seven million, one hundred ninety thousand, nine hundred eighty-three".