2068991129 has 2 divisors, whose sum is σ = 2068991130. Its totient is φ = 2068991128.

The previous prime is 2068991087. The next prime is 2068991131. The reversal of 2068991129 is 9211998602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1819193104 + 249798025 = 42652^2 + 15805^2 .

It is a cyclic number.

It is not a de Polignac number, because 2068991129 - 2¹² = 2068987033 is a prime.

It is a Sophie Germain prime.

Together with 2068991131, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2068991629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1034495564 + 1034495565.

It is an arithmetic number, because the mean of its divisors is an integer number (1034495565).

Almost surely, 2^2068991129 is an apocalyptic number.

It is an amenable number.

2068991129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2068991129 is an equidigital number, since it uses as much as digits as its factorization.

2068991129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 2068991129 is about 45486.1641491124. The cubic root of 2068991129 is about 1274.2448182566.

The spelling of 2068991129 in words is "two billion, sixty-eight million, nine hundred ninety-one thousand, one hundred twenty-nine".