105020687 has 4 divisors (see below), whose sum is σ = 108642120. Its totient is φ = 101399256.

The previous prime is 105020683. The next prime is 105020717. The reversal of 105020687 is 786020501.

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 105020687 - 2² = 105020683 is a prime.

It is a super-2 number, since 2×105020687² = 22058689395903938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 3621403 = 105020687 / (1 + 0 + 5 + 0 + 2 + 0 + 6 + 8 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105020683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810673 + ... + 1810730.

It is an arithmetic number, because the mean of its divisors is an integer number (27160530).

Almost surely, 2^105020687 is an apocalyptic number.

105020687 is a deficient number, since it is larger than the sum of its proper divisors (3621433).

105020687 is an equidigital number, since it uses as much as digits as its factorization.

105020687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621432.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 105020687 is about 10247.9601384861. The cubic root of 105020687 is about 471.8003785163.

The spelling of 105020687 in words is "one hundred five million, twenty thousand, six hundred eighty-seven".