87580489 has 2 divisors, whose sum is σ = 87580490. Its totient is φ = 87580488.

The previous prime is 87580483. The next prime is 87580499. The reversal of 87580489 is 98408578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83905600 + 3674889 = 9160^2 + 1917^2 .

It is a cyclic number.

It is not a de Polignac number, because 87580489 - 2¹³ = 87572297 is a prime.

It is not a weakly prime, because it can be changed into another prime (87580483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43790244 + 43790245.

It is an arithmetic number, because the mean of its divisors is an integer number (43790245).

Almost surely, 2^87580489 is an apocalyptic number.

It is an amenable number.

87580489 is a deficient number, since it is larger than the sum of its proper divisors (1).

87580489 is an equidigital number, since it uses as much as digits as its factorization.

87580489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 49.

The square root of 87580489 is about 9358.4447960118. Note that the first 3 decimals coincide. The cubic root of 87580489 is about 444.0880858294.

The spelling of 87580489 in words is "eighty-seven million, five hundred eighty thousand, four hundred eighty-nine".