816968147 has 4 divisors (see below), whose sum is σ = 834350496. Its totient is φ = 799585800.

The previous prime is 816968123. The next prime is 816968171. The reversal of 816968147 is 741869618.

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

It is an interprime number because it is at equal distance from previous prime (816968123) and next prime (816968171).

It is a cyclic number.

It is not a de Polignac number, because 816968147 - 2¹² = 816964051 is a prime.

It is a super-2 number, since 2×816968147² = 1334873906425227218, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816968095 and 816968104.

It is not an unprimeable number, because it can be changed into a prime (816965147) 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, 8691104 + ... + 8691197.

It is an arithmetic number, because the mean of its divisors is an integer number (208587624).

Almost surely, 2^816968147 is an apocalyptic number.

816968147 is a deficient number, since it is larger than the sum of its proper divisors (17382349).

816968147 is a wasteful number, since it uses less digits than its factorization.

816968147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17382348.

The product of its digits is 580608, while the sum is 50.

The square root of 816968147 is about 28582.6546527785. The cubic root of 816968147 is about 934.8351666877.

The spelling of 816968147 in words is "eight hundred sixteen million, nine hundred sixty-eight thousand, one hundred forty-seven".