4897938121 has 2 divisors, whose sum is σ = 4897938122. Its totient is φ = 4897938120.

The previous prime is 4897938109. The next prime is 4897938169. The reversal of 4897938121 is 1218397984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4750655625 + 147282496 = 68925^2 + 12136^2 .

It is a cyclic number.

It is not a de Polignac number, because 4897938121 - 2¹¹ = 4897936073 is a prime.

It is not a weakly prime, because it can be changed into another prime (4897938181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2448969060 + 2448969061.

It is an arithmetic number, because the mean of its divisors is an integer number (2448969061).

Almost surely, 2^4897938121 is an apocalyptic number.

It is an amenable number.

4897938121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4897938121 is an equidigital number, since it uses as much as digits as its factorization.

4897938121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 4897938121 is about 69985.2707432071. The cubic root of 4897938121 is about 1698.2609807267.

The spelling of 4897938121 in words is "four billion, eight hundred ninety-seven million, nine hundred thirty-eight thousand, one hundred twenty-one".