2141989991 has 2 divisors, whose sum is σ = 2141989992. Its totient is φ = 2141989990.

The previous prime is 2141989961. The next prime is 2141989999. The reversal of 2141989991 is 1999891412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2141989991 - 2²² = 2137795687 is a prime.

It is a super-2 number, since 2×2141989991² = 9176242243088360162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2141989999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070994995 + 1070994996.

It is an arithmetic number, because the mean of its divisors is an integer number (1070994996).

Almost surely, 2^2141989991 is an apocalyptic number.

2141989991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2141989991 is an equidigital number, since it uses as much as digits as its factorization.

2141989991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 53.

The square root of 2141989991 is about 46281.6377303137. The cubic root of 2141989991 is about 1289.0580610505.

The spelling of 2141989991 in words is "two billion, one hundred forty-one million, nine hundred eighty-nine thousand, nine hundred ninety-one".