2109530787 has 64 divisors (see below), whose sum is σ = 3520226304. Its totient is φ = 1094123520.

The previous prime is 2109530783. The next prime is 2109530791. The reversal of 2109530787 is 7870359012.

It is an interprime number because it is at equal distance from previous prime (2109530783) and next prime (2109530791).

It is not a de Polignac number, because 2109530787 - 2² = 2109530783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2109530783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7507087 + ... + 7507367.

It is an arithmetic number, because the mean of its divisors is an integer number (55003536).

Almost surely, 2^2109530787 is an apocalyptic number.

2109530787 is a deficient number, since it is larger than the sum of its proper divisors (1410695517).

2109530787 is a wasteful number, since it uses less digits than its factorization.

2109530787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 2109530787 is about 45929.6286399096. The cubic root of 2109530787 is about 1282.5135316182.

Adding to 2109530787 its reverse (7870359012), we get a palindrome (9979889799).

The spelling of 2109530787 in words is "two billion, one hundred nine million, five hundred thirty thousand, seven hundred eighty-seven".