2139437873 has 2 divisors, whose sum is σ = 2139437874. Its totient is φ = 2139437872.

The previous prime is 2139437849. The next prime is 2139437891. The reversal of 2139437873 is 3787349312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2138785009 + 652864 = 46247^2 + 808^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139437873 - 2¹⁶ = 2139372337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2139433873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069718936 + 1069718937.

It is an arithmetic number, because the mean of its divisors is an integer number (1069718937).

Almost surely, 2^2139437873 is an apocalyptic number.

It is an amenable number.

2139437873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139437873 is an equidigital number, since it uses as much as digits as its factorization.

2139437873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 47.

The square root of 2139437873 is about 46254.0579084690. The cubic root of 2139437873 is about 1288.5458993476.

The spelling of 2139437873 in words is "two billion, one hundred thirty-nine million, four hundred thirty-seven thousand, eight hundred seventy-three".