87585689 has 2 divisors, whose sum is σ = 87585690. Its totient is φ = 87585688.

The previous prime is 87585647. The next prime is 87585709. The reversal of 87585689 is 98658578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 5139289 = 9080^2 + 2267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87585689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87584689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43792844 + 43792845.

It is an arithmetic number, because the mean of its divisors is an integer number (43792845).

Almost surely, 2^87585689 is an apocalyptic number.

It is an amenable number.

87585689 is a deficient number, since it is larger than the sum of its proper divisors (1).

87585689 is an equidigital number, since it uses as much as digits as its factorization.

87585689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 56.

The square root of 87585689 is about 9358.7226158274. The cubic root of 87585689 is about 444.0968747441.

The spelling of 87585689 in words is "eighty-seven million, five hundred eighty-five thousand, six hundred eighty-nine".