3139138477 has 2 divisors, whose sum is σ = 3139138478. Its totient is φ = 3139138476.

The previous prime is 3139138439. The next prime is 3139138517. The reversal of 3139138477 is 7748319313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2244769641 + 894368836 = 47379^2 + 29906^2 .

It is a cyclic number.

It is not a de Polignac number, because 3139138477 - 2²⁷ = 3004920749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3139138427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569569238 + 1569569239.

It is an arithmetic number, because the mean of its divisors is an integer number (1569569239).

Almost surely, 2^3139138477 is an apocalyptic number.

It is an amenable number.

3139138477 is a deficient number, since it is larger than the sum of its proper divisors (1).

3139138477 is an equidigital number, since it uses as much as digits as its factorization.

3139138477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 3139138477 is about 56028.0151085151. The cubic root of 3139138477 is about 1464.2104140133.

The spelling of 3139138477 in words is "three billion, one hundred thirty-nine million, one hundred thirty-eight thousand, four hundred seventy-seven".