8139913829 has 2 divisors, whose sum is σ = 8139913830. Its totient is φ = 8139913828.

The previous prime is 8139913799. The next prime is 8139913867. The reversal of 8139913829 is 9283199318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6371711329 + 1768202500 = 79823^2 + 42050^2 .

It is a cyclic number.

It is not a de Polignac number, because 8139913829 - 2¹⁶ = 8139848293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8139913129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069956914 + 4069956915.

It is an arithmetic number, because the mean of its divisors is an integer number (4069956915).

Almost surely, 2^8139913829 is an apocalyptic number.

It is an amenable number.

8139913829 is a deficient number, since it is larger than the sum of its proper divisors (1).

8139913829 is an equidigital number, since it uses as much as digits as its factorization.

8139913829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The square root of 8139913829 is about 90221.4709977619. The cubic root of 8139913829 is about 2011.5921667734.

The spelling of 8139913829 in words is "eight billion, one hundred thirty-nine million, nine hundred thirteen thousand, eight hundred twenty-nine".