8915213447 has 4 divisors (see below), whose sum is σ = 10188815376. Its totient is φ = 7641611520.

The previous prime is 8915213401. The next prime is 8915213453. The reversal of 8915213447 is 7443125198.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8915213447 - 2⁸ = 8915213191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8915213398 and 8915213407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8915216447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636800954 + ... + 636800967.

It is an arithmetic number, because the mean of its divisors is an integer number (2547203844).

Almost surely, 2^8915213447 is an apocalyptic number.

8915213447 is a deficient number, since it is larger than the sum of its proper divisors (1273601929).

8915213447 is a wasteful number, since it uses less digits than its factorization.

8915213447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273601928.

The product of its digits is 241920, while the sum is 44.

The square root of 8915213447 is about 94420.4080006012. The cubic root of 8915213447 is about 2073.5312350053.

The spelling of 8915213447 in words is "eight billion, nine hundred fifteen million, two hundred thirteen thousand, four hundred forty-seven".