199993357 has 2 divisors, whose sum is σ = 199993358. Its totient is φ = 199993356.

The previous prime is 199993333. The next prime is 199993361. The reversal of 199993357 is 753399991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123010281 + 76983076 = 11091^2 + 8774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199993357 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199993298 and 199993307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199991357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99996678 + 99996679.

It is an arithmetic number, because the mean of its divisors is an integer number (99996679).

Almost surely, 2^199993357 is an apocalyptic number.

It is an amenable number.

199993357 is a deficient number, since it is larger than the sum of its proper divisors (1).

199993357 is an equidigital number, since it uses as much as digits as its factorization.

199993357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2066715, while the sum is 55.

The square root of 199993357 is about 14141.9007562633. The cubic root of 199993357 is about 584.7970728209.

The spelling of 199993357 in words is "one hundred ninety-nine million, nine hundred ninety-three thousand, three hundred fifty-seven".