984172555987 has 2 divisors, whose sum is σ = 984172555988. Its totient is φ = 984172555986.

The previous prime is 984172555973. The next prime is 984172555991. The reversal of 984172555987 is 789555271489.

984172555987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (789555271489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 984172555987 - 2³¹ = 982025072339 is a prime.

It is not a weakly prime, because it can be changed into another prime (984172555907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492086277993 + 492086277994.

It is an arithmetic number, because the mean of its divisors is an integer number (492086277994).

Almost surely, 2^984172555987 is an apocalyptic number.

984172555987 is a deficient number, since it is larger than the sum of its proper divisors (1).

984172555987 is an equidigital number, since it uses as much as digits as its factorization.

984172555987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016000, while the sum is 70.

The spelling of 984172555987 in words is "nine hundred eighty-four billion, one hundred seventy-two million, five hundred fifty-five thousand, nine hundred eighty-seven".