623107321 has 2 divisors, whose sum is σ = 623107322. Its totient is φ = 623107320.

The previous prime is 623107313. The next prime is 623107333. The reversal of 623107321 is 123701326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537729721 + 85377600 = 23189^2 + 9240^2 .

It is a cyclic number.

It is not a de Polignac number, because 623107321 - 2³ = 623107313 is a prime.

It is not a weakly prime, because it can be changed into another prime (623107621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311553660 + 311553661.

It is an arithmetic number, because the mean of its divisors is an integer number (311553661).

Almost surely, 2^623107321 is an apocalyptic number.

It is an amenable number.

623107321 is a deficient number, since it is larger than the sum of its proper divisors (1).

623107321 is an equidigital number, since it uses as much as digits as its factorization.

623107321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 623107321 is about 24962.1177186552. The cubic root of 623107321 is about 854.1240511988.

Adding to 623107321 its reverse (123701326), we get a palindrome (746808647).

The spelling of 623107321 in words is "six hundred twenty-three million, one hundred seven thousand, three hundred twenty-one".