5193198421 has 2 divisors, whose sum is σ = 5193198422. Its totient is φ = 5193198420.

The previous prime is 5193198391. The next prime is 5193198463. The reversal of 5193198421 is 1248913915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4204095921 + 989102500 = 64839^2 + 31450^2 .

It is a cyclic number.

It is not a de Polignac number, because 5193198421 - 2²¹ = 5191101269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5193198121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2596599210 + 2596599211.

It is an arithmetic number, because the mean of its divisors is an integer number (2596599211).

Almost surely, 2^5193198421 is an apocalyptic number.

It is an amenable number.

5193198421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5193198421 is an equidigital number, since it uses as much as digits as its factorization.

5193198421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 43.

The square root of 5193198421 is about 72063.8496126872. The cubic root of 5193198421 is about 1731.7225229395.

The spelling of 5193198421 in words is "five billion, one hundred ninety-three million, one hundred ninety-eight thousand, four hundred twenty-one".