198787357 has 2 divisors, whose sum is σ = 198787358. Its totient is φ = 198787356.

The previous prime is 198787339. The next prime is 198787387. The reversal of 198787357 is 753787891.

It is a happy number.

198787357 is digitally balanced in base 2, 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., 136913401 + 61873956 = 11701^2 + 7866^2 .

It is an emirp because it is prime and its reverse (753787891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198787357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198787298 and 198787307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198787327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99393678 + 99393679.

It is an arithmetic number, because the mean of its divisors is an integer number (99393679).

Almost surely, 2^198787357 is an apocalyptic number.

It is an amenable number.

198787357 is a deficient number, since it is larger than the sum of its proper divisors (1).

198787357 is an equidigital number, since it uses as much as digits as its factorization.

198787357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 55.

The square root of 198787357 is about 14099.1970338740. The cubic root of 198787357 is about 583.6192209178.

The spelling of 198787357 in words is "one hundred ninety-eight million, seven hundred eighty-seven thousand, three hundred fifty-seven".