29138149687 has 4 divisors (see below), whose sum is σ = 29157435216. Its totient is φ = 29118864160.

The previous prime is 29138149669. The next prime is 29138149699. The reversal of 29138149687 is 78694183192.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29138149687 - 2¹¹ = 29138147639 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 (29138149627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9640498 + ... + 9643519.

It is an arithmetic number, because the mean of its divisors is an integer number (7289358804).

Almost surely, 2^29138149687 is an apocalyptic number.

29138149687 is a deficient number, since it is larger than the sum of its proper divisors (19285529).

29138149687 is a wasteful number, since it uses less digits than its factorization.

29138149687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19285528.

The product of its digits is 5225472, while the sum is 58.

The spelling of 29138149687 in words is "twenty-nine billion, one hundred thirty-eight million, one hundred forty-nine thousand, six hundred eighty-seven".