623144513 has 2 divisors, whose sum is σ = 623144514. Its totient is φ = 623144512.

The previous prime is 623144453. The next prime is 623144531. The reversal of 623144513 is 315441326.

Together with next prime (623144531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496086529 + 127057984 = 22273^2 + 11272^2 .

It is a cyclic number.

It is not a de Polignac number, because 623144513 - 2⁶ = 623144449 is a prime.

It is not a weakly prime, because it can be changed into another prime (623144593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311572256 + 311572257.

It is an arithmetic number, because the mean of its divisors is an integer number (311572257).

Almost surely, 2^623144513 is an apocalyptic number.

It is an amenable number.

623144513 is a deficient number, since it is larger than the sum of its proper divisors (1).

623144513 is an equidigital number, since it uses as much as digits as its factorization.

623144513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 623144513 is about 24962.8626763839. The cubic root of 623144513 is about 854.1410444992.

Adding to 623144513 its reverse (315441326), we get a palindrome (938585839).

The spelling of 623144513 in words is "six hundred twenty-three million, one hundred forty-four thousand, five hundred thirteen".