2101931983 has 4 divisors (see below), whose sum is σ = 2107226920. Its totient is φ = 2096637048.

The previous prime is 2101931971. The next prime is 2101931999. The reversal of 2101931983 is 3891391012.

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 2101931983 - 2²¹ = 2099834831 is a prime.

It is a super-2 number, since 2×2101931983² = 8836236122316624578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101931903) 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, 2646873 + ... + 2647666.

It is an arithmetic number, because the mean of its divisors is an integer number (526806730).

Almost surely, 2^2101931983 is an apocalyptic number.

2101931983 is a deficient number, since it is larger than the sum of its proper divisors (5294937).

2101931983 is an equidigital number, since it uses as much as digits as its factorization.

2101931983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294936.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 2101931983 is about 45846.8317662191. The cubic root of 2101931983 is about 1280.9717521082.

The spelling of 2101931983 in words is "two billion, one hundred one million, nine hundred thirty-one thousand, nine hundred eighty-three".