199455957 has 6 divisors (see below), whose sum is σ = 288103062. Its totient is φ = 132970632.

The previous prime is 199455923. The next prime is 199455967. The reversal of 199455957 is 759554991.

199455957 is a `hidden beast` number, since 1 + 9 + 9 + 45 + 595 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 155975121 + 43480836 = 12489^2 + 6594^2 .

It is a de Polignac number, because none of the positive numbers 2^k-199455957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199455967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11080878 + ... + 11080895.

It is an arithmetic number, because the mean of its divisors is an integer number (48017177).

Almost surely, 2^199455957 is an apocalyptic number.

It is an amenable number.

199455957 is a deficient number, since it is larger than the sum of its proper divisors (88647105).

199455957 is a wasteful number, since it uses less digits than its factorization.

199455957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22161779 (or 22161776 counting only the distinct ones).

The product of its digits is 2551500, while the sum is 54.

The square root of 199455957 is about 14122.8877004669. The cubic root of 199455957 is about 584.2728023100.

The spelling of 199455957 in words is "one hundred ninety-nine million, four hundred fifty-five thousand, nine hundred fifty-seven".