623642041 has 4 divisors (see below), whose sum is σ = 680336784. Its totient is φ = 566947300.

The previous prime is 623642027. The next prime is 623642051. The reversal of 623642041 is 140246326.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 623642041 - 2⁷ = 623641913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623642051) 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 in 3 ways as a sum of consecutive naturals, for example, 28347355 + ... + 28347376.

It is an arithmetic number, because the mean of its divisors is an integer number (170084196).

Almost surely, 2^623642041 is an apocalyptic number.

It is an amenable number.

623642041 is a deficient number, since it is larger than the sum of its proper divisors (56694743).

623642041 is a wasteful number, since it uses less digits than its factorization.

623642041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56694742.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 623642041 is about 24972.8260515305. The cubic root of 623642041 is about 854.3683037352.

Adding to 623642041 its reverse (140246326), we get a palindrome (763888367).

The spelling of 623642041 in words is "six hundred twenty-three million, six hundred forty-two thousand, forty-one".