816249423 has 24 divisors (see below), whose sum is σ = 1221744384. Its totient is φ = 484161040.

The previous prime is 816249419. The next prime is 816249431. The reversal of 816249423 is 324942618.

It is not a de Polignac number, because 816249423 - 2² = 816249419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816249433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6861 + ... + 40982.

It is an arithmetic number, because the mean of its divisors is an integer number (50906016).

Almost surely, 2^816249423 is an apocalyptic number.

816249423 is a deficient number, since it is larger than the sum of its proper divisors (405494961).

816249423 is a wasteful number, since it uses less digits than its factorization.

816249423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47915 (or 47904 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 816249423 is about 28570.0791563482. The cubic root of 816249423 is about 934.5609472666.

The spelling of 816249423 in words is "eight hundred sixteen million, two hundred forty-nine thousand, four hundred twenty-three".