195820137 has 24 divisors (see below), whose sum is σ = 310689600. Its totient is φ = 118296288.

The previous prime is 195820133. The next prime is 195820139. The reversal of 195820137 is 731028591.

It is not a de Polignac number, because 195820137 - 2² = 195820133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195820133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20962 + ... + 28827.

It is an arithmetic number, because the mean of its divisors is an integer number (12945400).

Almost surely, 2^195820137 is an apocalyptic number.

It is an amenable number.

195820137 is a deficient number, since it is larger than the sum of its proper divisors (114869463).

195820137 is a wasteful number, since it uses less digits than its factorization.

195820137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49837 (or 49834 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 195820137 is about 13993.5748470503. The cubic root of 195820137 is about 580.7008343461.

The spelling of 195820137 in words is "one hundred ninety-five million, eight hundred twenty thousand, one hundred thirty-seven".