805636487 has 2 divisors, whose sum is σ = 805636488. Its totient is φ = 805636486.

The previous prime is 805636453. The next prime is 805636523. The reversal of 805636487 is 784636508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805636487 - 2⁸ = 805636231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805636417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402818243 + 402818244.

It is an arithmetic number, because the mean of its divisors is an integer number (402818244).

Almost surely, 2^805636487 is an apocalyptic number.

805636487 is a deficient number, since it is larger than the sum of its proper divisors (1).

805636487 is an equidigital number, since it uses as much as digits as its factorization.

805636487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 805636487 is about 28383.7363114865. The cubic root of 805636487 is about 930.4928543470.

The spelling of 805636487 in words is "eight hundred five million, six hundred thirty-six thousand, four hundred eighty-seven".