2149537009 has 4 divisors (see below), whose sum is σ = 2149649316. Its totient is φ = 2149424704.

The previous prime is 2149536997. The next prime is 2149537037. The reversal of 2149537009 is 9007359412.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1580857600 + 568679409 = 39760^2 + 23847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149537009 - 2⁷ = 2149536881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149537609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19444 + ... + 68389.

It is an arithmetic number, because the mean of its divisors is an integer number (537412329).

Almost surely, 2^2149537009 is an apocalyptic number.

It is an amenable number.

2149537009 is a deficient number, since it is larger than the sum of its proper divisors (112307).

2149537009 is an equidigital number, since it uses as much as digits as its factorization.

2149537009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112306.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 2149537009 is about 46363.0996483195. The cubic root of 2149537009 is about 1290.5702282404.

The spelling of 2149537009 in words is "two billion, one hundred forty-nine million, five hundred thirty-seven thousand, nine".