199242957 has 8 divisors (see below), whose sum is σ = 265831840. Its totient is φ = 132741360.

The previous prime is 199242937. The next prime is 199242959. The reversal of 199242957 is 759242991.

199242957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199242957 - 2⁶ = 199242893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199242959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16294 + ... + 25767.

It is an arithmetic number, because the mean of its divisors is an integer number (33228980).

Almost surely, 2^199242957 is an apocalyptic number.

It is an amenable number.

199242957 is a deficient number, since it is larger than the sum of its proper divisors (66588883).

199242957 is a wasteful number, since it uses less digits than its factorization.

199242957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43643.

The product of its digits is 408240, while the sum is 48.

The square root of 199242957 is about 14115.3447354289. The cubic root of 199242957 is about 584.0647456286.

The spelling of 199242957 in words is "one hundred ninety-nine million, two hundred forty-two thousand, nine hundred fifty-seven".