9874152287921 has 2 divisors, whose sum is σ = 9874152287922. Its totient is φ = 9874152287920.

The previous prime is 9874152287869. The next prime is 9874152288043. The reversal of 9874152287921 is 1297822514789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7877766973696 + 1996385314225 = 2806736^2 + 1412935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9874152287921 is a prime.

It is not a weakly prime, because it can be changed into another prime (9874152287821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4937076143960 + 4937076143961.

It is an arithmetic number, because the mean of its divisors is an integer number (4937076143961).

Almost surely, 2^{9874152287921} is an apocalyptic number.

It is an amenable number.

9874152287921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9874152287921 is an equidigital number, since it uses as much as digits as its factorization.

9874152287921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 65.

The spelling of 9874152287921 in words is "nine trillion, eight hundred seventy-four billion, one hundred fifty-two million, two hundred eighty-seven thousand, nine hundred twenty-one".