3988848599921 has 2 divisors, whose sum is σ = 3988848599922. Its totient is φ = 3988848599920.

The previous prime is 3988848599899. The next prime is 3988848600083. The reversal of 3988848599921 is 1299958488893.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3225217300321 + 763631299600 = 1795889^2 + 873860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3988848599921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3988848599921.

It is not a weakly prime, because it can be changed into another prime (3988848599621) 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, 1994424299960 + 1994424299961.

It is an arithmetic number, because the mean of its divisors is an integer number (1994424299961).

Almost surely, 2^{3988848599921} is an apocalyptic number.

It is an amenable number.

3988848599921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3988848599921 is an equidigital number, since it uses as much as digits as its factorization.

3988848599921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3224862720, while the sum is 83.

The spelling of 3988848599921 in words is "three trillion, nine hundred eighty-eight billion, eight hundred forty-eight million, five hundred ninety-nine thousand, nine hundred twenty-one".