823977942 has 16 divisors (see below), whose sum is σ = 1649238192. Its totient is φ = 274445600.

The previous prime is 823977929. The next prime is 823977949. The reversal of 823977942 is 249779328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823977949) 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 7 ways as a sum of consecutive naturals, for example, 44973 + ... + 60584.

It is an arithmetic number, because the mean of its divisors is an integer number (103077387).

Almost surely, 2^823977942 is an apocalyptic number.

823977942 is an abundant number, since it is smaller than the sum of its proper divisors (825260250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

823977942 is a wasteful number, since it uses less digits than its factorization.

823977942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106863.

The product of its digits is 1524096, while the sum is 51.

The square root of 823977942 is about 28705.0159728226. The cubic root of 823977942 is about 937.5012639272.

The spelling of 823977942 in words is "eight hundred twenty-three million, nine hundred seventy-seven thousand, nine hundred forty-two".