823939967 has 8 divisors (see below), whose sum is σ = 856773840. Its totient is φ = 791400960.

The previous prime is 823939957. The next prime is 823939981. The reversal of 823939967 is 769939328.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 823939967 - 2¹⁶ = 823874431 is a prime.

It is a super-2 number, since 2×823939967² = 1357754138439922178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823939957) 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, 68009 + ... + 79202.

It is an arithmetic number, because the mean of its divisors is an integer number (107096730).

Almost surely, 2^823939967 is an apocalyptic number.

823939967 is a deficient number, since it is larger than the sum of its proper divisors (32833873).

823939967 is a wasteful number, since it uses less digits than its factorization.

823939967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147433.

The product of its digits is 4408992, while the sum is 56.

The square root of 823939967 is about 28704.3544954420. The cubic root of 823939967 is about 937.4868613744.

The spelling of 823939967 in words is "eight hundred twenty-three million, nine hundred thirty-nine thousand, nine hundred sixty-seven".