199475657 has 2 divisors, whose sum is σ = 199475658. Its totient is φ = 199475656.

The previous prime is 199475641. The next prime is 199475677. The reversal of 199475657 is 756574991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190136521 + 9339136 = 13789^2 + 3056^2 .

It is an emirp because it is prime and its reverse (756574991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199475657 - 2⁴ = 199475641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199475599 and 199475608.

It is not a weakly prime, because it can be changed into another prime (199475677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99737828 + 99737829.

It is an arithmetic number, because the mean of its divisors is an integer number (99737829).

Almost surely, 2^199475657 is an apocalyptic number.

It is an amenable number.

199475657 is a deficient number, since it is larger than the sum of its proper divisors (1).

199475657 is an equidigital number, since it uses as much as digits as its factorization.

199475657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2381400, while the sum is 53.

The square root of 199475657 is about 14123.5851326779. The cubic root of 199475657 is about 584.2920376263.

The spelling of 199475657 in words is "one hundred ninety-nine million, four hundred seventy-five thousand, six hundred fifty-seven".