2129899686 has 36 divisors (see below), whose sum is σ = 4330818732. Its totient is φ = 698322824.

The previous prime is 2129899669. The next prime is 2129899687. The reversal of 2129899686 is 6869989212.

It is a super-3 number, since 3×2129899686³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129899687) 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 17 ways as a sum of consecutive naturals, for example, 9382705 + ... + 9382931.

Almost surely, 2^2129899686 is an apocalyptic number.

2129899686 is an abundant number, since it is smaller than the sum of its proper divisors (2200919046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2129899686 is an frugal number, since it uses more digits than its factorization.

2129899686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 315 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 60.

The square root of 2129899686 is about 46150.8362437779. The cubic root of 2129899686 is about 1286.6281523397.

The spelling of 2129899686 in words is "two billion, one hundred twenty-nine million, eight hundred ninety-nine thousand, six hundred eighty-six".