864813147 has 32 divisors (see below), whose sum is σ = 1304916480. Its totient is φ = 504645120.

The previous prime is 864813143. The next prime is 864813151. The reversal of 864813147 is 741318468.

It is an interprime number because it is at equal distance from previous prime (864813143) and next prime (864813151).

It is not a de Polignac number, because 864813147 - 2² = 864813143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864813099 and 864813108.

It is not an unprimeable number, because it can be changed into a prime (864813143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413338 + ... + 415424.

It is an arithmetic number, because the mean of its divisors is an integer number (40778640).

Almost surely, 2^864813147 is an apocalyptic number.

864813147 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

864813147 is a deficient number, since it is larger than the sum of its proper divisors (440103333).

864813147 is a wasteful number, since it uses less digits than its factorization.

864813147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563.

The product of its digits is 129024, while the sum is 42.

The square root of 864813147 is about 29407.7055718395. The cubic root of 864813147 is about 952.7393315688.

The spelling of 864813147 in words is "eight hundred sixty-four million, eight hundred thirteen thousand, one hundred forty-seven".