2045310989 has 4 divisors (see below), whose sum is σ = 2064075420. Its totient is φ = 2026546560.

The previous prime is 2045310979. The next prime is 2045311001. The reversal of 2045310989 is 9890135402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 530933764 + 1514377225 = 23042^2 + 38915^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045310989 - 2⁴ = 2045310973 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 (2045310929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9382052 + ... + 9382269.

It is an arithmetic number, because the mean of its divisors is an integer number (516018855).

Almost surely, 2^2045310989 is an apocalyptic number.

It is an amenable number.

2045310989 is a deficient number, since it is larger than the sum of its proper divisors (18764431).

2045310989 is a wasteful number, since it uses less digits than its factorization.

2045310989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18764430.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 2045310989 is about 45225.1145824972. The cubic root of 2045310989 is about 1269.3647988086.

The spelling of 2045310989 in words is "two billion, forty-five million, three hundred ten thousand, nine hundred eighty-nine".