511979139 has 12 divisors (see below), whose sum is σ = 845172016. Its totient is φ = 292559472.

The previous prime is 511979119. The next prime is 511979173. The reversal of 511979139 is 931979115.

It is a happy number.

It is not a de Polignac number, because 511979139 - 2⁵ = 511979107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 511979094 and 511979103.

It is not an unprimeable number, because it can be changed into a prime (511979119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4063264 + ... + 4063389.

Almost surely, 2^511979139 is an apocalyptic number.

511979139 is a deficient number, since it is larger than the sum of its proper divisors (333192877).

511979139 is a wasteful number, since it uses less digits than its factorization.

511979139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8126666 (or 8126663 counting only the distinct ones).

The product of its digits is 76545, while the sum is 45.

The square root of 511979139 is about 22626.9560259439. The cubic root of 511979139 is about 799.9891347483.

The spelling of 511979139 in words is "five hundred eleven million, nine hundred seventy-nine thousand, one hundred thirty-nine".