623305541 has 2 divisors, whose sum is σ = 623305542. Its totient is φ = 623305540.

The previous prime is 623305531. The next prime is 623305567. The reversal of 623305541 is 145503326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607425316 + 15880225 = 24646^2 + 3985^2 .

It is a cyclic number.

It is not a de Polignac number, because 623305541 - 2²² = 619111237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623305531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311652770 + 311652771.

It is an arithmetic number, because the mean of its divisors is an integer number (311652771).

Almost surely, 2^623305541 is an apocalyptic number.

It is an amenable number.

623305541 is a deficient number, since it is larger than the sum of its proper divisors (1).

623305541 is an equidigital number, since it uses as much as digits as its factorization.

623305541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 623305541 is about 24966.0878192800. The cubic root of 623305541 is about 854.2146115855.

Adding to 623305541 its reverse (145503326), we get a palindrome (768808867).

The spelling of 623305541 in words is "six hundred twenty-three million, three hundred five thousand, five hundred forty-one".