2102073991 has 2 divisors, whose sum is σ = 2102073992. Its totient is φ = 2102073990.

The previous prime is 2102073931. The next prime is 2102074003. The reversal of 2102073991 is 1993702012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102073991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102073931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051036995 + 1051036996.

It is an arithmetic number, because the mean of its divisors is an integer number (1051036996).

Almost surely, 2^2102073991 is an apocalyptic number.

2102073991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102073991 is an equidigital number, since it uses as much as digits as its factorization.

2102073991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 2102073991 is about 45848.3804621276. The cubic root of 2102073991 is about 1281.0005992421. Note that the first 3 decimals are identical.

The spelling of 2102073991 in words is "two billion, one hundred two million, seventy-three thousand, nine hundred ninety-one".