823994919 has 24 divisors (see below), whose sum is σ = 1307779200. Its totient is φ = 495789840.

The previous prime is 823994903. The next prime is 823994957. The reversal of 823994919 is 919499328.

It is not a de Polignac number, because 823994919 - 2⁴ = 823994903 is a prime.

It is a super-2 number, since 2×823994919² = 1357935253075633122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823994219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16179 + ... + 43700.

It is an arithmetic number, because the mean of its divisors is an integer number (54490800).

Almost surely, 2^823994919 is an apocalyptic number.

823994919 is a deficient number, since it is larger than the sum of its proper divisors (483784281).

823994919 is a wasteful number, since it uses less digits than its factorization.

823994919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60035 (or 60032 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 823994919 is about 28705.3116861671. The cubic root of 823994919 is about 937.5077025500.

The spelling of 823994919 in words is "eight hundred twenty-three million, nine hundred ninety-four thousand, nine hundred nineteen".