195137997 has 16 divisors (see below), whose sum is σ = 266716800. Its totient is φ = 126855872.

The previous prime is 195137989. The next prime is 195138011. The reversal of 195137997 is 799731591.

195137997 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 195137997 - 2³ = 195137989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195137927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22879 + ... + 30227.

It is an arithmetic number, because the mean of its divisors is an integer number (16669800).

Almost surely, 2^195137997 is an apocalyptic number.

It is an amenable number.

195137997 is a deficient number, since it is larger than the sum of its proper divisors (71578803).

195137997 is a wasteful number, since it uses less digits than its factorization.

195137997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7572.

The product of its digits is 535815, while the sum is 51.

The square root of 195137997 is about 13969.1802551188. The cubic root of 195137997 is about 580.0257588639.

The spelling of 195137997 in words is "one hundred ninety-five million, one hundred thirty-seven thousand, nine hundred ninety-seven".