198278753 has 2 divisors, whose sum is σ = 198278754. Its totient is φ = 198278752.

The previous prime is 198278749. The next prime is 198278797. The reversal of 198278753 is 357872891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103469584 + 94809169 = 10172^2 + 9737^2 .

It is an emirp because it is prime and its reverse (357872891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198278753 - 2² = 198278749 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198277753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99139376 + 99139377.

It is an arithmetic number, because the mean of its divisors is an integer number (99139377).

Almost surely, 2^198278753 is an apocalyptic number.

It is an amenable number.

198278753 is a deficient number, since it is larger than the sum of its proper divisors (1).

198278753 is an equidigital number, since it uses as much as digits as its factorization.

198278753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 50.

The square root of 198278753 is about 14081.1488522776. The cubic root of 198278753 is about 583.1210594890.

The spelling of 198278753 in words is "one hundred ninety-eight million, two hundred seventy-eight thousand, seven hundred fifty-three".