816479479 has 2 divisors, whose sum is σ = 816479480. Its totient is φ = 816479478.

The previous prime is 816479473. The next prime is 816479497. The reversal of 816479479 is 974974618.

Together with next prime (816479497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816479479 - 2¹⁵ = 816446711 is a prime.

It is a super-2 number, since 2×816479479² = 1333277479256222882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816479473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408239739 + 408239740.

It is an arithmetic number, because the mean of its divisors is an integer number (408239740).

Almost surely, 2^816479479 is an apocalyptic number.

816479479 is a deficient number, since it is larger than the sum of its proper divisors (1).

816479479 is an equidigital number, since it uses as much as digits as its factorization.

816479479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 55.

The square root of 816479479 is about 28574.1050428530. The cubic root of 816479479 is about 934.6487395318.

The spelling of 816479479 in words is "eight hundred sixteen million, four hundred seventy-nine thousand, four hundred seventy-nine".