198437441437 has 2 divisors, whose sum is σ = 198437441438. Its totient is φ = 198437441436.

The previous prime is 198437441383. The next prime is 198437441467. The reversal of 198437441437 is 734144734891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198268935076 + 168506361 = 445274^2 + 12981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198437441437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198437441467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99218720718 + 99218720719.

It is an arithmetic number, because the mean of its divisors is an integer number (99218720719).

Almost surely, 2^198437441437 is an apocalyptic number.

It is an amenable number.

198437441437 is a deficient number, since it is larger than the sum of its proper divisors (1).

198437441437 is an equidigital number, since it uses as much as digits as its factorization.

198437441437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 55.

The spelling of 198437441437 in words is "one hundred ninety-eight billion, four hundred thirty-seven million, four hundred forty-one thousand, four hundred thirty-seven".