2149898689 has 9 divisors (see below), whose sum is σ = 2170069923. Its totient is φ = 2129914512.

The previous prime is 2149898593. The next prime is 2149898719. The reversal of 2149898689 is 9868989412.

The square root of 2149898689 is 46367.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 436601025 + 1713297664 = 20895^2 + 41392^2 .

It is not a de Polignac number, because 2149898689 - 2¹⁹ = 2149374401 is a prime.

It is a Duffinian number.

Its product of digits (17915904) is a multiple of the sum of its prime divisors (432).

It is a self number, because there is not a number n which added to its sum of digits gives 2149898689.

It is not an unprimeable number, because it can be changed into a prime (2149898189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9226917 + ... + 9227149.

Almost surely, 2^2149898689 is an apocalyptic number.

2149898689 is the 46367-th square number.

2149898689 is the 23184-th centered octagonal number.

It is an amenable number.

2149898689 is a deficient number, since it is larger than the sum of its proper divisors (20171234).

2149898689 is an frugal number, since it uses more digits than its factorization.

2149898689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 432 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 64.

The cubic root of 2149898689 is about 1290.6426077436.

Multiplying 2149898689 by its sum of digits (64), we get a square (137593516096 = 370936²).

The spelling of 2149898689 in words is "two billion, one hundred forty-nine million, eight hundred ninety-eight thousand, six hundred eighty-nine".