805242647 has 8 divisors (see below), whose sum is σ = 879174912. Its totient is φ = 731431800.

The previous prime is 805242631. The next prime is 805242671. The reversal of 805242647 is 746242508.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 805242647 - 2⁴ = 805242631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 805242647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805244647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16193 + ... + 43274.

It is an arithmetic number, because the mean of its divisors is an integer number (109896864).

Almost surely, 2^805242647 is an apocalyptic number.

805242647 is a deficient number, since it is larger than the sum of its proper divisors (73932265).

805242647 is a wasteful number, since it uses less digits than its factorization.

805242647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60709.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 805242647 is about 28376.7976875475. The cubic root of 805242647 is about 930.3412040498.

The spelling of 805242647 in words is "eight hundred five million, two hundred forty-two thousand, six hundred forty-seven".