199741957 has 4 divisors (see below), whose sum is σ = 202555296. Its totient is φ = 196928620.

The previous prime is 199741951. The next prime is 199741967. The reversal of 199741957 is 759147991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 199741957 - 2¹¹ = 199739909 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 (199741951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406563 + ... + 1406704.

It is an arithmetic number, because the mean of its divisors is an integer number (50638824).

Almost surely, 2^199741957 is an apocalyptic number.

It is an amenable number.

199741957 is a deficient number, since it is larger than the sum of its proper divisors (2813339).

199741957 is an equidigital number, since it uses as much as digits as its factorization.

199741957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813338.

The product of its digits is 714420, while the sum is 52.

The square root of 199741957 is about 14133.0094813525. The cubic root of 199741957 is about 584.5519319623.

The spelling of 199741957 in words is "one hundred ninety-nine million, seven hundred forty-one thousand, nine hundred fifty-seven".