105139212687 has 12 divisors (see below), whose sum is σ = 159860791480. Its totient is φ = 66403713168.

The previous prime is 105139212677. The next prime is 105139212701. The reversal of 105139212687 is 786212931501.

105139212687 is a `hidden beast` number, since 1 + 0 + 513 + 9 + 2 + 126 + 8 + 7 = 666.

It is not a de Polignac number, because 105139212687 - 2⁴ = 105139212671 is a prime.

It is a super-2 number, since 2×105139212687² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105139212677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307424428 + ... + 307424769.

Almost surely, 2^105139212687 is an apocalyptic number.

105139212687 is a deficient number, since it is larger than the sum of its proper divisors (54721578793).

105139212687 is a wasteful number, since it uses less digits than its factorization.

105139212687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614849222 (or 614849219 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 105139212687 in words is "one hundred five billion, one hundred thirty-nine million, two hundred twelve thousand, six hundred eighty-seven".