868491147 has 16 divisors (see below), whose sum is σ = 1181669888. Its totient is φ = 567259200.

The previous prime is 868491139. The next prime is 868491157. The reversal of 868491147 is 741194868.

It is not a de Polignac number, because 868491147 - 2³ = 868491139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 868491096 and 868491105.

It is not an unprimeable number, because it can be changed into a prime (868491137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19938 + ... + 46200.

It is an arithmetic number, because the mean of its divisors is an integer number (73854368).

Almost surely, 2^868491147 is an apocalyptic number.

868491147 is a deficient number, since it is larger than the sum of its proper divisors (313178741).

868491147 is a wasteful number, since it uses less digits than its factorization.

868491147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26490.

The product of its digits is 387072, while the sum is 48.

The square root of 868491147 is about 29470.1738542547. The cubic root of 868491147 is about 954.0880696530.

The spelling of 868491147 in words is "eight hundred sixty-eight million, four hundred ninety-one thousand, one hundred forty-seven".