199479457 has 2 divisors, whose sum is σ = 199479458. Its totient is φ = 199479456.

The previous prime is 199479419. The next prime is 199479481. The reversal of 199479457 is 754974991.

199479457 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., 118461456 + 81018001 = 10884^2 + 9001^2 .

It is an emirp because it is prime and its reverse (754974991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199479457 - 2²³ = 191090849 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199479398 and 199479407.

It is not a weakly prime, because it can be changed into another prime (199429457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99739728 + 99739729.

It is an arithmetic number, because the mean of its divisors is an integer number (99739729).

Almost surely, 2^199479457 is an apocalyptic number.

It is an amenable number.

199479457 is a deficient number, since it is larger than the sum of its proper divisors (1).

199479457 is an equidigital number, since it uses as much as digits as its factorization.

199479457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 55.

The square root of 199479457 is about 14123.7196587868. The cubic root of 199479457 is about 584.2957478462.

The spelling of 199479457 in words is "one hundred ninety-nine million, four hundred seventy-nine thousand, four hundred fifty-seven".