3138865123 has 2 divisors, whose sum is σ = 3138865124. Its totient is φ = 3138865122.

The previous prime is 3138865087. The next prime is 3138865127. The reversal of 3138865123 is 3215688313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3138865123 is a prime.

It is not a weakly prime, because it can be changed into another prime (3138865127) 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, 1569432561 + 1569432562.

It is an arithmetic number, because the mean of its divisors is an integer number (1569432562).

Almost surely, 2^3138865123 is an apocalyptic number.

3138865123 is a deficient number, since it is larger than the sum of its proper divisors (1).

3138865123 is an equidigital number, since it uses as much as digits as its factorization.

3138865123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 3138865123 is about 56025.5756150707. The cubic root of 3138865123 is about 1464.1679119707.

The spelling of 3138865123 in words is "three billion, one hundred thirty-eight million, eight hundred sixty-five thousand, one hundred twenty-three".