623244131 has 2 divisors, whose sum is σ = 623244132. Its totient is φ = 623244130.

The previous prime is 623244079. The next prime is 623244161. The reversal of 623244131 is 131442326.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623244131 is a prime.

It is a super-2 number, since 2×623244131² = 776866493651890322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 623244131.

It is not a weakly prime, because it can be changed into another prime (623244161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311622065 + 311622066.

It is an arithmetic number, because the mean of its divisors is an integer number (311622066).

Almost surely, 2^623244131 is an apocalyptic number.

623244131 is a deficient number, since it is larger than the sum of its proper divisors (1).

623244131 is an equidigital number, since it uses as much as digits as its factorization.

623244131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

The square root of 623244131 is about 24964.8579206852. The cubic root of 623244131 is about 854.1865573709.

Adding to 623244131 its reverse (131442326), we get a palindrome (754686457).

The spelling of 623244131 in words is "six hundred twenty-three million, two hundred forty-four thousand, one hundred thirty-one".