816479474 has 4 divisors (see below), whose sum is σ = 1224719214. Its totient is φ = 408239736.

The previous prime is 816479473. The next prime is 816479479. The reversal of 816479474 is 474974618.

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

It can be written as a sum of positive squares in only one way, i.e., 737394025 + 79085449 = 27155^2 + 8893^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (816479473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204119867 + ... + 204119870.

Almost surely, 2^816479474 is an apocalyptic number.

816479474 is a deficient number, since it is larger than the sum of its proper divisors (408239740).

816479474 is a wasteful number, since it uses less digits than its factorization.

816479474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408239739.

The product of its digits is 1354752, while the sum is 50.

The square root of 816479474 is about 28574.1049553612. The cubic root of 816479474 is about 934.6487376239.

The spelling of 816479474 in words is "eight hundred sixteen million, four hundred seventy-nine thousand, four hundred seventy-four".