823143407 has 2 divisors, whose sum is σ = 823143408. Its totient is φ = 823143406.

The previous prime is 823143379. The next prime is 823143427. The reversal of 823143407 is 704341328.

823143407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823143407 is a prime.

It is a Chen prime.

It is equal to p_42274580 and since 823143407 and 42274580 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823143427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411571703 + 411571704.

It is an arithmetic number, because the mean of its divisors is an integer number (411571704).

Almost surely, 2^823143407 is an apocalyptic number.

823143407 is a deficient number, since it is larger than the sum of its proper divisors (1).

823143407 is an equidigital number, since it uses as much as digits as its factorization.

823143407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 823143407 is about 28690.4758935783. The cubic root of 823143407 is about 937.1846527414.

The spelling of 823143407 in words is "eight hundred twenty-three million, one hundred forty-three thousand, four hundred seven".