2139695993 has 2 divisors, whose sum is σ = 2139695994. Its totient is φ = 2139695992.

The previous prime is 2139695989. The next prime is 2139696029. The reversal of 2139695993 is 3995969312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1565230969 + 574465024 = 39563^2 + 23968^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139695993 - 2² = 2139695989 is a prime.

It is not a weakly prime, because it can be changed into another prime (2139695983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069847996 + 1069847997.

It is an arithmetic number, because the mean of its divisors is an integer number (1069847997).

Almost surely, 2^2139695993 is an apocalyptic number.

It is an amenable number.

2139695993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139695993 is an equidigital number, since it uses as much as digits as its factorization.

2139695993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3542940, while the sum is 56.

The square root of 2139695993 is about 46256.8480659891. The cubic root of 2139695993 is about 1288.5977176463.

The spelling of 2139695993 in words is "two billion, one hundred thirty-nine million, six hundred ninety-five thousand, nine hundred ninety-three".