29479779839 has 2 divisors, whose sum is σ = 29479779840. Its totient is φ = 29479779838.

The previous prime is 29479779829. The next prime is 29479779851. The reversal of 29479779839 is 93897797492.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29479779839 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29479779829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14739889919 + 14739889920.

It is an arithmetic number, because the mean of its divisors is an integer number (14739889920).

Almost surely, 2^29479779839 is an apocalyptic number.

29479779839 is a deficient number, since it is larger than the sum of its proper divisors (1).

29479779839 is an equidigital number, since it uses as much as digits as its factorization.

29479779839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432081216, while the sum is 74.

The spelling of 29479779839 in words is "twenty-nine billion, four hundred seventy-nine million, seven hundred seventy-nine thousand, eight hundred thirty-nine".