623879289801791 has 2 divisors, whose sum is σ = 623879289801792. Its totient is φ = 623879289801790.

The previous prime is 623879289801679. The next prime is 623879289801797. The reversal of 623879289801791 is 197108982978326.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623879289801791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623879289801797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311939644900895 + 311939644900896.

It is an arithmetic number, because the mean of its divisors is an integer number (311939644900896).

Almost surely, 2^{623879289801791} is an apocalyptic number.

623879289801791 is a deficient number, since it is larger than the sum of its proper divisors (1).

623879289801791 is an equidigital number, since it uses as much as digits as its factorization.

623879289801791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1316818944, while the sum is 80.

The spelling of 623879289801791 in words is "six hundred twenty-three trillion, eight hundred seventy-nine billion, two hundred eighty-nine million, eight hundred one thousand, seven hundred ninety-one".