195641907 has 4 divisors (see below), whose sum is σ = 260855880. Its totient is φ = 130427936.

The previous prime is 195641893. The next prime is 195641923. The reversal of 195641907 is 709146591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 195641907 - 2⁶ = 195641843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195641987) 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 3 ways as a sum of consecutive naturals, for example, 32606982 + ... + 32606987.

It is an arithmetic number, because the mean of its divisors is an integer number (65213970).

Almost surely, 2^195641907 is an apocalyptic number.

195641907 is a deficient number, since it is larger than the sum of its proper divisors (65213973).

195641907 is an equidigital number, since it uses as much as digits as its factorization.

195641907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65213972.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 195641907 is about 13987.2051175351. The cubic root of 195641907 is about 580.5246016603.

The spelling of 195641907 in words is "one hundred ninety-five million, six hundred forty-one thousand, nine hundred seven".