3138542779 has 2 divisors, whose sum is σ = 3138542780. Its totient is φ = 3138542778.

The previous prime is 3138542761. The next prime is 3138542789. The reversal of 3138542779 is 9772458313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3138542779 - 2⁵ = 3138542747 is a prime.

It is a super-2 number, since 2×3138542779² = 19700901551226085682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3138542789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569271389 + 1569271390.

It is an arithmetic number, because the mean of its divisors is an integer number (1569271390).

Almost surely, 2^3138542779 is an apocalyptic number.

3138542779 is a deficient number, since it is larger than the sum of its proper divisors (1).

3138542779 is an equidigital number, since it uses as much as digits as its factorization.

3138542779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 3138542779 is about 56022.6987836181. The cubic root of 3138542779 is about 1464.1177896197.

The spelling of 3138542779 in words is "three billion, one hundred thirty-eight million, five hundred forty-two thousand, seven hundred seventy-nine".