2689229861 has 4 divisors (see below), whose sum is σ = 2702880972. Its totient is φ = 2675578752.

The previous prime is 2689229833. The next prime is 2689229941. The reversal of 2689229861 is 1689229862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2273477761 + 415752100 = 47681^2 + 20390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689229861 - 2¹⁰ = 2689228837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2689229801) 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 3 ways as a sum of consecutive naturals, for example, 6825260 + ... + 6825653.

It is an arithmetic number, because the mean of its divisors is an integer number (675720243).

Almost surely, 2^2689229861 is an apocalyptic number.

It is an amenable number.

2689229861 is a deficient number, since it is larger than the sum of its proper divisors (13651111).

2689229861 is a wasteful number, since it uses less digits than its factorization.

2689229861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13651110.

The product of its digits is 1492992, while the sum is 53.

The square root of 2689229861 is about 51857.7849604088. The cubic root of 2689229861 is about 1390.6226806617.

Subtracting from 2689229861 its reverse (1689229862), we obtain a palindrome (999999999).

The spelling of 2689229861 in words is "two billion, six hundred eighty-nine million, two hundred twenty-nine thousand, eight hundred sixty-one".