2146980991 has 2 divisors, whose sum is σ = 2146980992. Its totient is φ = 2146980990.

The previous prime is 2146980989. The next prime is 2146981007. The reversal of 2146980991 is 1990896412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2146980991 - 2¹ = 2146980989 is a prime.

Together with 2146980989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2146980961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073490495 + 1073490496.

It is an arithmetic number, because the mean of its divisors is an integer number (1073490496).

Almost surely, 2^2146980991 is an apocalyptic number.

2146980991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2146980991 is an equidigital number, since it uses as much as digits as its factorization.

2146980991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 2146980991 is about 46335.5262298811. The cubic root of 2146980991 is about 1290.0584856203.

The spelling of 2146980991 in words is "two billion, one hundred forty-six million, nine hundred eighty thousand, nine hundred ninety-one".