813735823 has 2 divisors, whose sum is σ = 813735824. Its totient is φ = 813735822.

The previous prime is 813735799. The next prime is 813735841. The reversal of 813735823 is 328537318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 813735823 - 2²⁹ = 276864911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813738823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406867911 + 406867912.

It is an arithmetic number, because the mean of its divisors is an integer number (406867912).

Almost surely, 2^813735823 is an apocalyptic number.

813735823 is a deficient number, since it is larger than the sum of its proper divisors (1).

813735823 is an equidigital number, since it uses as much as digits as its factorization.

813735823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 813735823 is about 28526.0551601514. The cubic root of 813735823 is about 933.6006493519.

The spelling of 813735823 in words is "eight hundred thirteen million, seven hundred thirty-five thousand, eight hundred twenty-three".