195507987 has 8 divisors (see below), whose sum is σ = 260938704. Its totient is φ = 130207968.

The previous prime is 195507953. The next prime is 195507997. The reversal of 195507987 is 789705591.

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

It is not a de Polignac number, because 195507987 - 2⁷ = 195507859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195507947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29128 + ... + 35205.

It is an arithmetic number, because the mean of its divisors is an integer number (32617338).

Almost surely, 2^195507987 is an apocalyptic number.

195507987 is a deficient number, since it is larger than the sum of its proper divisors (65430717).

195507987 is a wasteful number, since it uses less digits than its factorization.

195507987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65349.

The product of its (nonzero) digits is 793800, while the sum is 51.

The square root of 195507987 is about 13982.4170657294. The cubic root of 195507987 is about 580.3921119813.

The spelling of 195507987 in words is "one hundred ninety-five million, five hundred seven thousand, nine hundred eighty-seven".