1580989489 has 2 divisors, whose sum is σ = 1580989490. Its totient is φ = 1580989488.

The previous prime is 1580989469. The next prime is 1580989493. The reversal of 1580989489 is 9849890851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1576725264 + 4264225 = 39708^2 + 2065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1580989489 - 2²⁷ = 1446771761 is a prime.

It is a super-2 number, since 2×1580989489² = 4999055528656962242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1580989439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790494744 + 790494745.

It is an arithmetic number, because the mean of its divisors is an integer number (790494745).

Almost surely, 2^1580989489 is an apocalyptic number.

It is an amenable number.

1580989489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1580989489 is an equidigital number, since it uses as much as digits as its factorization.

1580989489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 61.

The square root of 1580989489 is about 39761.6585292918. The cubic root of 1580989489 is about 1164.9563711120.

The spelling of 1580989489 in words is "one billion, five hundred eighty million, nine hundred eighty-nine thousand, four hundred eighty-nine".