2146809437 has 4 divisors (see below), whose sum is σ = 2173984320. Its totient is φ = 2119634556.

The previous prime is 2146809409. The next prime is 2146809451. The reversal of 2146809437 is 7349086412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2146809437 - 2²⁰ = 2145760861 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 (2146809407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13587323 + ... + 13587480.

It is an arithmetic number, because the mean of its divisors is an integer number (543496080).

Almost surely, 2^2146809437 is an apocalyptic number.

It is an amenable number.

2146809437 is a deficient number, since it is larger than the sum of its proper divisors (27174883).

2146809437 is an equidigital number, since it uses as much as digits as its factorization.

2146809437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27174882.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 2146809437 is about 46333.6749783567. The cubic root of 2146809437 is about 1290.0241241007.

The spelling of 2146809437 in words is "two billion, one hundred forty-six million, eight hundred nine thousand, four hundred thirty-seven".