2639768129 has 2 divisors, whose sum is σ = 2639768130. Its totient is φ = 2639768128.

The previous prime is 2639768101. The next prime is 2639768161. The reversal of 2639768129 is 9218679362.

It is a happy number.

2639768129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1485331600 + 1154436529 = 38540^2 + 33977^2 .

It is a cyclic number.

It is not a de Polignac number, because 2639768129 - 2¹² = 2639764033 is a prime.

It is not a weakly prime, because it can be changed into another prime (2639768429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319884064 + 1319884065.

It is an arithmetic number, because the mean of its divisors is an integer number (1319884065).

Almost surely, 2^2639768129 is an apocalyptic number.

It is an amenable number.

2639768129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639768129 is an equidigital number, since it uses as much as digits as its factorization.

2639768129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 2639768129 is about 51378.6738735051. The cubic root of 2639768129 is about 1382.0441820210.

The spelling of 2639768129 in words is "two billion, six hundred thirty-nine million, seven hundred sixty-eight thousand, one hundred twenty-nine".