195637897 has 8 divisors (see below), whose sum is σ = 240785216. Its totient is φ = 154790352.

The previous prime is 195637879. The next prime is 195637901. The reversal of 195637897 is 798736591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195637897 - 2²³ = 187249289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195637817) 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, 1074843 + ... + 1075024.

It is an arithmetic number, because the mean of its divisors is an integer number (30098152).

Almost surely, 2^195637897 is an apocalyptic number.

It is an amenable number.

195637897 is a deficient number, since it is larger than the sum of its proper divisors (45147319).

195637897 is a wasteful number, since it uses less digits than its factorization.

195637897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149887.

The product of its digits is 2857680, while the sum is 55.

The square root of 195637897 is about 13987.0617715087. The cubic root of 195637897 is about 580.5206353670.

The spelling of 195637897 in words is "one hundred ninety-five million, six hundred thirty-seven thousand, eight hundred ninety-seven".