872124310991 has 2 divisors, whose sum is σ = 872124310992. Its totient is φ = 872124310990.

The previous prime is 872124310973. The next prime is 872124310999. The reversal of 872124310991 is 199013421278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 872124310991 - 2¹⁸ = 872124048847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872124310999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436062155495 + 436062155496.

It is an arithmetic number, because the mean of its divisors is an integer number (436062155496).

Almost surely, 2^872124310991 is an apocalyptic number.

872124310991 is a deficient number, since it is larger than the sum of its proper divisors (1).

872124310991 is an equidigital number, since it uses as much as digits as its factorization.

872124310991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 872124310991 in words is "eight hundred seventy-two billion, one hundred twenty-four million, three hundred ten thousand, nine hundred ninety-one".