2149640489 has 4 divisors (see below), whose sum is σ = 2175539856. Its totient is φ = 2123741124.

The previous prime is 2149640483. The next prime is 2149640491. The reversal of 2149640489 is 9840469412.

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 2149640489 - 2⁴ = 2149640473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149640483) 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, 12949559 + ... + 12949724.

It is an arithmetic number, because the mean of its divisors is an integer number (543884964).

Almost surely, 2^2149640489 is an apocalyptic number.

It is an amenable number.

2149640489 is a deficient number, since it is larger than the sum of its proper divisors (25899367).

2149640489 is an equidigital number, since it uses as much as digits as its factorization.

2149640489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25899366.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 2149640489 is about 46364.2156085919. The cubic root of 2149640489 is about 1290.5909375162.

The spelling of 2149640489 in words is "two billion, one hundred forty-nine million, six hundred forty thousand, four hundred eighty-nine".