3948948121 has 2 divisors, whose sum is σ = 3948948122. Its totient is φ = 3948948120.

The previous prime is 3948948097. The next prime is 3948948191. The reversal of 3948948121 is 1218498493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3948362896 + 585225 = 62836^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 3948948121 - 2¹⁵ = 3948915353 is a prime.

It is not a weakly prime, because it can be changed into another prime (3948948191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974474060 + 1974474061.

It is an arithmetic number, because the mean of its divisors is an integer number (1974474061).

Almost surely, 2^3948948121 is an apocalyptic number.

It is an amenable number.

3948948121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3948948121 is an equidigital number, since it uses as much as digits as its factorization.

3948948121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The square root of 3948948121 is about 62840.6565926869. The cubic root of 3948948121 is about 1580.6187985048.

The spelling of 3948948121 in words is "three billion, nine hundred forty-eight million, nine hundred forty-eight thousand, one hundred twenty-one".