195112791 has 36 divisors (see below), whose sum is σ = 308576736. Its totient is φ = 118385280.

The previous prime is 195112787. The next prime is 195112807. The reversal of 195112791 is 197211591.

It is not a de Polignac number, because 195112791 - 2² = 195112787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195112741) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 146370 + ... + 147696.

It is an arithmetic number, because the mean of its divisors is an integer number (8571576).

Almost surely, 2^195112791 is an apocalyptic number.

195112791 is a deficient number, since it is larger than the sum of its proper divisors (113463945).

195112791 is a wasteful number, since it uses less digits than its factorization.

195112791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1378 counting only the distinct ones).

The product of its digits is 5670, while the sum is 36.

The square root of 195112791 is about 13968.2780255835. The cubic root of 195112791 is about 580.0007837881. Note that the first 3 decimals are identical.

The spelling of 195112791 in words is "one hundred ninety-five million, one hundred twelve thousand, seven hundred ninety-one".