199305397 has 2 divisors, whose sum is σ = 199305398. Its totient is φ = 199305396.

The previous prime is 199305343. The next prime is 199305409. The reversal of 199305397 is 793503991.

199305397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186978276 + 12327121 = 13674^2 + 3511^2 .

It is a cyclic number.

It is not a de Polignac number, because 199305397 - 2²⁷ = 65087669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199300397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99652698 + 99652699.

It is an arithmetic number, because the mean of its divisors is an integer number (99652699).

Almost surely, 2^199305397 is an apocalyptic number.

It is an amenable number.

199305397 is a deficient number, since it is larger than the sum of its proper divisors (1).

199305397 is an equidigital number, since it uses as much as digits as its factorization.

199305397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 199305397 is about 14117.5563395370. The cubic root of 199305397 is about 584.1257518733.

The spelling of 199305397 in words is "one hundred ninety-nine million, three hundred five thousand, three hundred ninety-seven".