2051640029 has 2 divisors, whose sum is σ = 2051640030. Its totient is φ = 2051640028.

The previous prime is 2051640013. The next prime is 2051640049. The reversal of 2051640029 is 9200461502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1764168004 + 287472025 = 42002^2 + 16955^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051640029 - 2⁴ = 2051640013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2051639983 and 2051640010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051640049) 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, 1025820014 + 1025820015.

It is an arithmetic number, because the mean of its divisors is an integer number (1025820015).

Almost surely, 2^2051640029 is an apocalyptic number.

It is an amenable number.

2051640029 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051640029 is an equidigital number, since it uses as much as digits as its factorization.

2051640029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2051640029 is about 45295.0331603808. The cubic root of 2051640029 is about 1270.6727642228.

The spelling of 2051640029 in words is "two billion, fifty-one million, six hundred forty thousand, twenty-nine".