623796389 has 2 divisors, whose sum is σ = 623796390. Its totient is φ = 623796388.

The previous prime is 623796367. The next prime is 623796451. The reversal of 623796389 is 983697326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555403489 + 68392900 = 23567^2 + 8270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623796389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623796389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623796689) 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, 311898194 + 311898195.

It is an arithmetic number, because the mean of its divisors is an integer number (311898195).

Almost surely, 2^623796389 is an apocalyptic number.

It is an amenable number.

623796389 is a deficient number, since it is larger than the sum of its proper divisors (1).

623796389 is an equidigital number, since it uses as much as digits as its factorization.

623796389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 53.

The square root of 623796389 is about 24975.9161793917. The cubic root of 623796389 is about 854.4387817513.

The spelling of 623796389 in words is "six hundred twenty-three million, seven hundred ninety-six thousand, three hundred eighty-nine".