5378191121 has 2 divisors, whose sum is σ = 5378191122. Its totient is φ = 5378191120.

The previous prime is 5378191097. The next prime is 5378191171. The reversal of 5378191121 is 1211918735.

It is a happy number.

5378191121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5246974096 + 131217025 = 72436^2 + 11455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5378191121 is a prime.

It is not a weakly prime, because it can be changed into another prime (5378191171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2689095560 + 2689095561.

It is an arithmetic number, because the mean of its divisors is an integer number (2689095561).

Almost surely, 2^5378191121 is an apocalyptic number.

It is an amenable number.

5378191121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5378191121 is an equidigital number, since it uses as much as digits as its factorization.

5378191121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 38.

The square root of 5378191121 is about 73336.1515284242. The cubic root of 5378191121 is about 1752.0456210581.

The spelling of 5378191121 in words is "five billion, three hundred seventy-eight million, one hundred ninety-one thousand, one hundred twenty-one".