2139102866 has 4 divisors (see below), whose sum is σ = 3208654302. Its totient is φ = 1069551432.

The previous prime is 2139102853. The next prime is 2139102871. The reversal of 2139102866 is 6682019312.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1503810841 + 635292025 = 38779^2 + 25205^2 .

It is a super-2 number, since 2×2139102866² = 9151522142658827912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534775715 + ... + 534775718.

Almost surely, 2^2139102866 is an apocalyptic number.

2139102866 is a deficient number, since it is larger than the sum of its proper divisors (1069551436).

2139102866 is a wasteful number, since it uses less digits than its factorization.

2139102866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069551435.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2139102866 is about 46250.4363871304. The cubic root of 2139102866 is about 1288.4786395571.

The spelling of 2139102866 in words is "two billion, one hundred thirty-nine million, one hundred two thousand, eight hundred sixty-six".