1980609089 has 4 divisors (see below), whose sum is σ = 2097115524. Its totient is φ = 1864102656.

The previous prime is 1980609073. The next prime is 1980609119. The reversal of 1980609089 is 9809060891.

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 1656897025 + 323712064 = 40705^2 + 17992^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980609089 - 2⁴ = 1980609073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980609289) 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, 58253192 + ... + 58253225.

It is an arithmetic number, because the mean of its divisors is an integer number (524278881).

Almost surely, 2^1980609089 is an apocalyptic number.

It is an amenable number.

1980609089 is a deficient number, since it is larger than the sum of its proper divisors (116506435).

1980609089 is a wasteful number, since it uses less digits than its factorization.

1980609089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116506434.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 1980609089 is about 44504.0345249731. The cubic root of 1980609089 is about 1255.8359829589.

The spelling of 1980609089 in words is "one billion, nine hundred eighty million, six hundred nine thousand, eighty-nine".