199389769 has 4 divisors (see below), whose sum is σ = 201325696. Its totient is φ = 197453844.

The previous prime is 199389767. The next prime is 199389793. The reversal of 199389769 is 967983991.

199389769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 967983991 = 13 ⋅74460307.

It is a cyclic number.

It is not a de Polignac number, because 199389769 - 2¹ = 199389767 is a prime.

It is a super-2 number, since 2×199389769² = 79512559963746722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199389767) 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, 967809 + ... + 968014.

It is an arithmetic number, because the mean of its divisors is an integer number (50331424).

Almost surely, 2^199389769 is an apocalyptic number.

199389769 is the 8153-rd hex number.

It is an amenable number.

199389769 is a deficient number, since it is larger than the sum of its proper divisors (1935927).

199389769 is a wasteful number, since it uses less digits than its factorization.

199389769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935926.

The product of its digits is 6613488, while the sum is 61.

The square root of 199389769 is about 14120.5442175576. The cubic root of 199389769 is about 584.2081662750.

The spelling of 199389769 in words is "one hundred ninety-nine million, three hundred eighty-nine thousand, seven hundred sixty-nine".