818357947 has 8 divisors (see below), whose sum is σ = 898442352. Its totient is φ = 739221600.

The previous prime is 818357923. The next prime is 818357957. The reversal of 818357947 is 749753818.

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

It is a cyclic number.

It is not a de Polignac number, because 818357947 - 2⁷ = 818357819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 818357894 and 818357903.

It is not an unprimeable number, because it can be changed into a prime (818357957) 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, 235204 + ... + 238657.

It is an arithmetic number, because the mean of its divisors is an integer number (112305294).

Almost surely, 2^818357947 is an apocalyptic number.

818357947 is a deficient number, since it is larger than the sum of its proper divisors (80084405).

818357947 is a wasteful number, since it uses less digits than its factorization.

818357947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474029.

The product of its digits is 1693440, while the sum is 52.

The square root of 818357947 is about 28606.9562694111. The cubic root of 818357947 is about 935.3649702370.

The spelling of 818357947 in words is "eight hundred eighteen million, three hundred fifty-seven thousand, nine hundred forty-seven".