868745647 has 12 divisors (see below), whose sum is σ = 1102453416. Its totient is φ = 676944240.

The previous prime is 868745609. The next prime is 868745671. The reversal of 868745647 is 746547868.

It is not a de Polignac number, because 868745647 - 2¹¹ = 868743599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868745687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 805348 + ... + 806425.

It is an arithmetic number, because the mean of its divisors is an integer number (91871118).

Almost surely, 2^868745647 is an apocalyptic number.

868745647 is a deficient number, since it is larger than the sum of its proper divisors (233707769).

868745647 is a wasteful number, since it uses less digits than its factorization.

868745647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611798 (or 1611791 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 55.

The square root of 868745647 is about 29474.4914629583. The cubic root of 868745647 is about 954.1812549052.

The spelling of 868745647 in words is "eight hundred sixty-eight million, seven hundred forty-five thousand, six hundred forty-seven".