199393965 has 24 divisors (see below), whose sum is σ = 348854688. Its totient is φ = 105347040.

The previous prime is 199393949. The next prime is 199393991. The reversal of 199393965 is 569393991.

It is a happy number.

199393965 is a `hidden beast` number, since 199 + 393 + 9 + 65 = 666.

199393965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199393965 - 2⁴ = 199393949 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15891 + ... + 25520.

It is an arithmetic number, because the mean of its divisors is an integer number (14535612).

Almost surely, 2^199393965 is an apocalyptic number.

199393965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199393965 is a deficient number, since it is larger than the sum of its proper divisors (149460723).

199393965 is a wasteful number, since it uses less digits than its factorization.

199393965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41529 (or 41526 counting only the distinct ones).

The product of its digits is 1771470, while the sum is 54.

The square root of 199393965 is about 14120.6927946188. The cubic root of 199393965 is about 584.2122643125.

The spelling of 199393965 in words is "one hundred ninety-nine million, three hundred ninety-three thousand, nine hundred sixty-five".