623010989 has 2 divisors, whose sum is σ = 623010990. Its totient is φ = 623010988.

The previous prime is 623010977. The next prime is 623011003. The reversal of 623010989 is 989010326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411075625 + 211935364 = 20275^2 + 14558^2 .

It is a cyclic number.

It is not a de Polignac number, because 623010989 - 2²⁰ = 621962413 is a prime.

It is a Chen prime.

623010989 is a modest number, since divided by 10989 gives 623 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623012989) 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, 311505494 + 311505495.

It is an arithmetic number, because the mean of its divisors is an integer number (311505495).

Almost surely, 2^623010989 is an apocalyptic number.

It is an amenable number.

623010989 is a deficient number, since it is larger than the sum of its proper divisors (1).

623010989 is an equidigital number, since it uses as much as digits as its factorization.

623010989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 623010989 is about 24960.1880802209. The cubic root of 623010989 is about 854.0800332499.

The spelling of 623010989 in words is "six hundred twenty-three million, ten thousand, nine hundred eighty-nine".