2638979633 has 2 divisors, whose sum is σ = 2638979634. Its totient is φ = 2638979632.

The previous prime is 2638979599. The next prime is 2638979689. The reversal of 2638979633 is 3369798362.

It is an a-pointer prime, because the next prime (2638979689) can be obtained adding 2638979633 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2513718769 + 125260864 = 50137^2 + 11192^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638979633 - 2⁶ = 2638979569 is a prime.

It is not a weakly prime, because it can be changed into another prime (2638999633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319489816 + 1319489817.

It is an arithmetic number, because the mean of its divisors is an integer number (1319489817).

Almost surely, 2^2638979633 is an apocalyptic number.

It is an amenable number.

2638979633 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638979633 is an equidigital number, since it uses as much as digits as its factorization.

2638979633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 56.

The square root of 2638979633 is about 51370.9999221351. Note that the first 4 decimals coincide. The cubic root of 2638979633 is about 1381.9065632637.

The spelling of 2638979633 in words is "two billion, six hundred thirty-eight million, nine hundred seventy-nine thousand, six hundred thirty-three".