85840687 has 2 divisors, whose sum is σ = 85840688. Its totient is φ = 85840686.

The previous prime is 85840673. The next prime is 85840709. The reversal of 85840687 is 78604858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85840687 - 2¹¹ = 85838639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85840187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42920343 + 42920344.

It is an arithmetic number, because the mean of its divisors is an integer number (42920344).

Almost surely, 2^85840687 is an apocalyptic number.

85840687 is a deficient number, since it is larger than the sum of its proper divisors (1).

85840687 is an equidigital number, since it uses as much as digits as its factorization.

85840687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 85840687 is about 9265.0249325083. The cubic root of 85840687 is about 441.1277663815.

The spelling of 85840687 in words is "eighty-five million, eight hundred forty thousand, six hundred eighty-seven".