2102749689 has 8 divisors (see below), whose sum is σ = 2835168480. Its totient is φ = 1386082016.

The previous prime is 2102749681. The next prime is 2102749711. The reversal of 2102749689 is 9869472012.

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 2102749689 - 2³ = 2102749681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2102749681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3937467 + ... + 3938000.

It is an arithmetic number, because the mean of its divisors is an integer number (354396060).

Almost surely, 2^2102749689 is an apocalyptic number.

It is an amenable number.

2102749689 is a deficient number, since it is larger than the sum of its proper divisors (732418791).

2102749689 is an equidigital number, since it uses as much as digits as its factorization.

2102749689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7875559.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 2102749689 is about 45855.7487017713. The cubic root of 2102749689 is about 1281.1378409724.

The spelling of 2102749689 in words is "two billion, one hundred two million, seven hundred forty-nine thousand, six hundred eighty-nine".