2139746057 has 2 divisors, whose sum is σ = 2139746058. Its totient is φ = 2139746056.

The previous prime is 2139746039. The next prime is 2139746071. The reversal of 2139746057 is 7506479312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2130376336 + 9369721 = 46156^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139746057 - 2¹⁰ = 2139745033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2139745999 and 2139746017.

It is not a weakly prime, because it can be changed into another prime (2139746087) 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, 1069873028 + 1069873029.

It is an arithmetic number, because the mean of its divisors is an integer number (1069873029).

Almost surely, 2^2139746057 is an apocalyptic number.

It is an amenable number.

2139746057 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139746057 is an equidigital number, since it uses as much as digits as its factorization.

2139746057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 2139746057 is about 46257.3892151297. The cubic root of 2139746057 is about 1288.6077676492.

The spelling of 2139746057 in words is "two billion, one hundred thirty-nine million, seven hundred forty-six thousand, fifty-seven".