864621147 has 8 divisors (see below), whose sum is σ = 1241507344. Its totient is φ = 532074528.

The previous prime is 864621127. The next prime is 864621151. The reversal of 864621147 is 741126468.

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

It is not a de Polignac number, because 864621147 - 2⁷ = 864621019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 22169773 = 864621147 / (8 + 6 + 4 + 6 + 2 + 1 + 1 + 4 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864621127) 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, 11084848 + ... + 11084925.

It is an arithmetic number, because the mean of its divisors is an integer number (155188418).

Almost surely, 2^864621147 is an apocalyptic number.

864621147 is a deficient number, since it is larger than the sum of its proper divisors (376886197).

864621147 is a wasteful number, since it uses less digits than its factorization.

864621147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22169789.

The product of its digits is 64512, while the sum is 39.

The square root of 864621147 is about 29404.4409401029. The cubic root of 864621147 is about 952.6688194236.

The spelling of 864621147 in words is "eight hundred sixty-four million, six hundred twenty-one thousand, one hundred forty-seven".