854636987 has 2 divisors, whose sum is σ = 854636988. Its totient is φ = 854636986.

The previous prime is 854636983. The next prime is 854636999. The reversal of 854636987 is 789636458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 854636987 - 2² = 854636983 is a prime.

It is not a weakly prime, because it can be changed into another prime (854636983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427318493 + 427318494.

It is an arithmetic number, because the mean of its divisors is an integer number (427318494).

Almost surely, 2^854636987 is an apocalyptic number.

854636987 is a deficient number, since it is larger than the sum of its proper divisors (1).

854636987 is an equidigital number, since it uses as much as digits as its factorization.

854636987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 56.

The square root of 854636987 is about 29234.1749840833. The cubic root of 854636987 is about 948.9876517888.

The spelling of 854636987 in words is "eight hundred fifty-four million, six hundred thirty-six thousand, nine hundred eighty-seven".