818921295 has 12 divisors (see below), whose sum is σ = 1419463656. Its totient is φ = 436758000.

The previous prime is 818921293. The next prime is 818921309. The reversal of 818921295 is 592129818.

It is not a de Polignac number, because 818921295 - 2¹ = 818921293 is a prime.

It is a super-4 number, since 4×818921295⁴ (a number of 37 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 18198251 = 818921295 / (8 + 1 + 8 + 9 + 2 + 1 + 2 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 818921295.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818921293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9099081 + ... + 9099170.

It is an arithmetic number, because the mean of its divisors is an integer number (118288638).

Almost surely, 2^818921295 is an apocalyptic number.

818921295 is a deficient number, since it is larger than the sum of its proper divisors (600542361).

818921295 is a wasteful number, since it uses less digits than its factorization.

818921295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18198262 (or 18198259 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 818921295 is about 28616.8009218361. The cubic root of 818921295 is about 935.5795524261.

The spelling of 818921295 in words is "eight hundred eighteen million, nine hundred twenty-one thousand, two hundred ninety-five".