823620613 has 2 divisors, whose sum is σ = 823620614. Its totient is φ = 823620612.

The previous prime is 823620563. The next prime is 823620737. The reversal of 823620613 is 316026328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 621355329 + 202265284 = 24927^2 + 14222^2 .

It is a cyclic number.

It is not a de Polignac number, because 823620613 - 2⁹ = 823620101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (824620613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411810306 + 411810307.

It is an arithmetic number, because the mean of its divisors is an integer number (411810307).

Almost surely, 2^823620613 is an apocalyptic number.

It is an amenable number.

823620613 is a deficient number, since it is larger than the sum of its proper divisors (1).

823620613 is an equidigital number, since it uses as much as digits as its factorization.

823620613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 823620613 is about 28698.7911417885. The cubic root of 823620613 is about 937.3657243660.

The spelling of 823620613 in words is "eight hundred twenty-three million, six hundred twenty thousand, six hundred thirteen".