2105669747 has 4 divisors (see below), whose sum is σ = 2107406880. Its totient is φ = 2103932616.

The previous prime is 2105669723. The next prime is 2105669749. The reversal of 2105669747 is 7479665012.

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 2105669747 - 2¹² = 2105665651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105669749) 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, 866747 + ... + 869172.

It is an arithmetic number, because the mean of its divisors is an integer number (526851720).

Almost surely, 2^2105669747 is an apocalyptic number.

2105669747 is a deficient number, since it is larger than the sum of its proper divisors (1737133).

2105669747 is a wasteful number, since it uses less digits than its factorization.

2105669747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737132.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 2105669747 is about 45887.5772622613. The cubic root of 2105669747 is about 1281.7305991859.

The spelling of 2105669747 in words is "two billion, one hundred five million, six hundred sixty-nine thousand, seven hundred forty-seven".