8138690029 has 6 divisors (see below), whose sum is σ = 8214307530. Its totient is φ = 8063089920.

The previous prime is 8138690009. The next prime is 8138690039. The reversal of 8138690029 is 9200968318.

It can be written as a sum of positive squares in 3 ways, for example, as 124322500 + 8014367529 = 11150^2 + 89523^2 .

It is not a de Polignac number, because 8138690029 - 2⁷ = 8138689901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138690009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 937549 + ... + 946189.

It is an arithmetic number, because the mean of its divisors is an integer number (1369051255).

Almost surely, 2^8138690029 is an apocalyptic number.

It is an amenable number.

8138690029 is a deficient number, since it is larger than the sum of its proper divisors (75617501).

8138690029 is an frugal number, since it uses more digits than its factorization.

8138690029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17391 (or 8750 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 8138690029 is about 90214.6885434961. The cubic root of 8138690029 is about 2011.4913503959.

The spelling of 8138690029 in words is "eight billion, one hundred thirty-eight million, six hundred ninety thousand, twenty-nine".