2106902705 has 8 divisors (see below), whose sum is σ = 2538122472. Its totient is φ = 1678962688.

The previous prime is 2106902687. The next prime is 2106902717. The reversal of 2106902705 is 5072096012.

It can be written as a sum of positive squares in 4 ways, for example, as 610682944 + 1496219761 = 24712^2 + 38681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2106902705 - 2²² = 2102708401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818522 + ... + 821091.

It is an arithmetic number, because the mean of its divisors is an integer number (317265309).

Almost surely, 2^2106902705 is an apocalyptic number.

It is an amenable number.

2106902705 is a deficient number, since it is larger than the sum of its proper divisors (431219767).

2106902705 is a wasteful number, since it uses less digits than its factorization.

2106902705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639875.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 2106902705 is about 45901.0098472790. The cubic root of 2106902705 is about 1281.9807193912.

Adding to 2106902705 its reverse (5072096012), we get a palindrome (7178998717).

The spelling of 2106902705 in words is "two billion, one hundred six million, nine hundred two thousand, seven hundred five".