3129776905 has 16 divisors (see below), whose sum is σ = 3859333200. Its totient is φ = 2434828032.

The previous prime is 3129776879. The next prime is 3129776917. The reversal of 3129776905 is 5096779213.

It can be written as a sum of positive squares in 8 ways, for example, as 19149376 + 3110627529 = 4376^2 + 55773^2 .

It is a cyclic number.

It is not a de Polignac number, because 3129776905 - 2⁷ = 3129776777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468247 + ... + 474883.

It is an arithmetic number, because the mean of its divisors is an integer number (241208325).

Almost surely, 2^3129776905 is an apocalyptic number.

It is an amenable number.

3129776905 is a deficient number, since it is larger than the sum of its proper divisors (729556295).

3129776905 is a wasteful number, since it uses less digits than its factorization.

3129776905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9228.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 3129776905 is about 55944.4090593511. The cubic root of 3129776905 is about 1462.7534367816.

The spelling of 3129776905 in words is "three billion, one hundred twenty-nine million, seven hundred seventy-six thousand, nine hundred five".