623533441 has 2 divisors, whose sum is σ = 623533442. Its totient is φ = 623533440.

The previous prime is 623533439. The next prime is 623533457. The reversal of 623533441 is 144335326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345811216 + 277722225 = 18596^2 + 16665^2 .

It is a cyclic number.

It is not a de Polignac number, because 623533441 - 2¹ = 623533439 is a prime.

Together with 623533439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (623533481) 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, 311766720 + 311766721.

It is an arithmetic number, because the mean of its divisors is an integer number (311766721).

Almost surely, 2^623533441 is an apocalyptic number.

It is an amenable number.

623533441 is a deficient number, since it is larger than the sum of its proper divisors (1).

623533441 is an equidigital number, since it uses as much as digits as its factorization.

623533441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 31.

The square root of 623533441 is about 24970.6515934206. The cubic root of 623533441 is about 854.3187080922.

Adding to 623533441 its reverse (144335326), we get a palindrome (767868767).

The spelling of 623533441 in words is "six hundred twenty-three million, five hundred thirty-three thousand, four hundred forty-one".