2139947633 has 2 divisors, whose sum is σ = 2139947634. Its totient is φ = 2139947632.

The previous prime is 2139947603. The next prime is 2139947687. The reversal of 2139947633 is 3367499312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2124011569 + 15936064 = 46087^2 + 3992^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139947633 - 2⁸ = 2139947377 is a prime.

It is not a weakly prime, because it can be changed into another prime (2139947603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069973816 + 1069973817.

It is an arithmetic number, because the mean of its divisors is an integer number (1069973817).

Almost surely, 2^2139947633 is an apocalyptic number.

It is an amenable number.

2139947633 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139947633 is an equidigital number, since it uses as much as digits as its factorization.

2139947633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 47.

The square root of 2139947633 is about 46259.5680157089. The cubic root of 2139947633 is about 1288.6482310557.

The spelling of 2139947633 in words is "two billion, one hundred thirty-nine million, nine hundred forty-seven thousand, six hundred thirty-three".