195540993 has 8 divisors (see below), whose sum is σ = 289690400. Its totient is φ = 130360644.

The previous prime is 195540991. The next prime is 195541001. The reversal of 195540993 is 399045591.

It is a happy number.

195540993 is a `hidden beast` number, since 1 + 9 + 554 + 0 + 9 + 93 = 666.

It is not a de Polignac number, because 195540993 - 2¹ = 195540991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195540991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3621103 + ... + 3621156.

It is an arithmetic number, because the mean of its divisors is an integer number (36211300).

Almost surely, 2^195540993 is an apocalyptic number.

It is an amenable number.

195540993 is a deficient number, since it is larger than the sum of its proper divisors (94149407).

195540993 is an equidigital number, since it uses as much as digits as its factorization.

195540993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242268 (or 7242262 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 195540993 is about 13983.5972839609. The cubic root of 195540993 is about 580.4247710804.

The spelling of 195540993 in words is "one hundred ninety-five million, five hundred forty thousand, nine hundred ninety-three".