816473819 has 12 divisors (see below), whose sum is σ = 950501448. Its totient is φ = 699300000.

The previous prime is 816473813. The next prime is 816473863. The reversal of 816473819 is 918374618.

It is not a de Polignac number, because 816473819 - 2²⁰ = 815425243 is a prime.

It is a super-2 number, since 2×816473819² = 1333258994224889522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816473813) 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, 66944 + ... + 78194.

It is an arithmetic number, because the mean of its divisors is an integer number (79208454).

Almost surely, 2^816473819 is an apocalyptic number.

816473819 is a deficient number, since it is larger than the sum of its proper divisors (134027629).

816473819 is a wasteful number, since it uses less digits than its factorization.

816473819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12746 (or 12739 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 816473819 is about 28574.0060019592. The cubic root of 816473819 is about 934.6465798024.

The spelling of 816473819 in words is "eight hundred sixteen million, four hundred seventy-three thousand, eight hundred nineteen".