2106291669 has 4 divisors (see below), whose sum is σ = 2808388896. Its totient is φ = 1404194444.

The previous prime is 2106291643. The next prime is 2106291701. The reversal of 2106291669 is 9661926012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2106291669 - 2⁷ = 2106291541 is a prime.

It is a super-2 number, since 2×2106291669² = 8872929189797611122, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2106291669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106291169) 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, 351048609 + ... + 351048614.

It is an arithmetic number, because the mean of its divisors is an integer number (702097224).

Almost surely, 2^2106291669 is an apocalyptic number.

It is an amenable number.

2106291669 is a deficient number, since it is larger than the sum of its proper divisors (702097227).

2106291669 is an equidigital number, since it uses as much as digits as its factorization.

2106291669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702097226.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 2106291669 is about 45894.3533454825. The cubic root of 2106291669 is about 1281.8567756660.

The spelling of 2106291669 in words is "two billion, one hundred six million, two hundred ninety-one thousand, six hundred sixty-nine".