623140543 has 2 divisors, whose sum is σ = 623140544. Its totient is φ = 623140542.

The previous prime is 623140537. The next prime is 623140561. The reversal of 623140543 is 345041326.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 623140543 - 2²¹ = 621043391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623540543) 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, 311570271 + 311570272.

It is an arithmetic number, because the mean of its divisors is an integer number (311570272).

Almost surely, 2^623140543 is an apocalyptic number.

623140543 is a deficient number, since it is larger than the sum of its proper divisors (1).

623140543 is an equidigital number, since it uses as much as digits as its factorization.

623140543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 623140543 is about 24962.7831581336. The cubic root of 623140543 is about 854.1392306090.

Adding to 623140543 its reverse (345041326), we get a palindrome (968181869).

The spelling of 623140543 in words is "six hundred twenty-three million, one hundred forty thousand, five hundred forty-three".