2123835987 has 32 divisors (see below), whose sum is σ = 3491776512. Its totient is φ = 1118173824.

The previous prime is 2123835971. The next prime is 2123836007. The reversal of 2123835987 is 7895383212.

It is a happy number.

It is not a de Polignac number, because 2123835987 - 2⁴ = 2123835971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123835907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145078 + ... + 159044.

It is an arithmetic number, because the mean of its divisors is an integer number (109118016).

Almost surely, 2^2123835987 is an apocalyptic number.

2123835987 is a deficient number, since it is larger than the sum of its proper divisors (1367940525).

2123835987 is a wasteful number, since it uses less digits than its factorization.

2123835987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14547.

The product of its digits is 725760, while the sum is 48.

The square root of 2123835987 is about 46085.0950633716. The cubic root of 2123835987 is about 1285.4060069481.

The spelling of 2123835987 in words is "two billion, one hundred twenty-three million, eight hundred thirty-five thousand, nine hundred eighty-seven".