195921705 has 64 divisors (see below), whose sum is σ = 386039808. Its totient is φ = 82874880.

The previous prime is 195921701. The next prime is 195921727. The reversal of 195921705 is 507129591.

It is not a de Polignac number, because 195921705 - 2² = 195921701 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (195921701) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73557 + ... + 76173.

It is an arithmetic number, because the mean of its divisors is an integer number (6031872).

Almost surely, 2^195921705 is an apocalyptic number.

195921705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

195921705 is a deficient number, since it is larger than the sum of its proper divisors (190118103).

195921705 is a wasteful number, since it uses less digits than its factorization.

195921705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686.

The product of its (nonzero) digits is 28350, while the sum is 39.

The square root of 195921705 is about 13997.2034706937. The cubic root of 195921705 is about 580.8012163069.

The spelling of 195921705 in words is "one hundred ninety-five million, nine hundred twenty-one thousand, seven hundred five".