2638918229 has 2 divisors, whose sum is σ = 2638918230. Its totient is φ = 2638918228.

The previous prime is 2638918207. The next prime is 2638918237. The reversal of 2638918229 is 9228198362.

2638918229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2630664100 + 8254129 = 51290^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638918229 - 2¹² = 2638914133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638908229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319459114 + 1319459115.

It is an arithmetic number, because the mean of its divisors is an integer number (1319459115).

Almost surely, 2^2638918229 is an apocalyptic number.

It is an amenable number.

2638918229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638918229 is an equidigital number, since it uses as much as digits as its factorization.

2638918229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The square root of 2638918229 is about 51370.4022662856. The cubic root of 2638918229 is about 1381.8958450745.

The spelling of 2638918229 in words is "two billion, six hundred thirty-eight million, nine hundred eighteen thousand, two hundred twenty-nine".