198143357 has 2 divisors, whose sum is σ = 198143358. Its totient is φ = 198143356.

The previous prime is 198143339. The next prime is 198143371. The reversal of 198143357 is 753341891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143664196 + 54479161 = 11986^2 + 7381^2 .

It is a cyclic number.

It is not a de Polignac number, because 198143357 - 2¹² = 198139261 is a prime.

It is a super-3 number, since 3×198143357³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198143317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99071678 + 99071679.

It is an arithmetic number, because the mean of its divisors is an integer number (99071679).

Almost surely, 2^198143357 is an apocalyptic number.

It is an amenable number.

198143357 is a deficient number, since it is larger than the sum of its proper divisors (1).

198143357 is an equidigital number, since it uses as much as digits as its factorization.

198143357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 198143357 is about 14076.3403269458. The cubic root of 198143357 is about 582.9882998671.

The spelling of 198143357 in words is "one hundred ninety-eight million, one hundred forty-three thousand, three hundred fifty-seven".