85118987 has 2 divisors, whose sum is σ = 85118988. Its totient is φ = 85118986.

The previous prime is 85118951. The next prime is 85119019. The reversal of 85118987 is 78981158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85118987 - 2²⁰ = 84070411 is a prime.

It is not a weakly prime, because it can be changed into another prime (85118587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42559493 + 42559494.

It is an arithmetic number, because the mean of its divisors is an integer number (42559494).

Almost surely, 2^85118987 is an apocalyptic number.

85118987 is a deficient number, since it is larger than the sum of its proper divisors (1).

85118987 is an equidigital number, since it uses as much as digits as its factorization.

85118987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 47.

The square root of 85118987 is about 9225.9951766734. The cubic root of 85118987 is about 439.8880345274. Note that the first 3 decimals are identical.

The spelling of 85118987 in words is "eighty-five million, one hundred eighteen thousand, nine hundred eighty-seven".