195988501 has 8 divisors (see below), whose sum is σ = 200773440. Its totient is φ = 191252448.

The previous prime is 195988433. The next prime is 195988517. The reversal of 195988501 is 105889591.

195988501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 195988501 - 2⁹ = 195987989 is a prime.

It is a super-2 number, since 2×195988501² = 76822985048454002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195988561) 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, 4041 + ... + 20206.

It is an arithmetic number, because the mean of its divisors is an integer number (25096680).

Almost surely, 2^195988501 is an apocalyptic number.

195988501 is the 8083-rd octagonal number.

It is an amenable number.

195988501 is a deficient number, since it is larger than the sum of its proper divisors (4784939).

195988501 is a wasteful number, since it uses less digits than its factorization.

195988501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24443.

The product of its (nonzero) digits is 129600, while the sum is 46.

The square root of 195988501 is about 13999.5893154049. The cubic root of 195988501 is about 580.8672134017.

The spelling of 195988501 in words is "one hundred ninety-five million, nine hundred eighty-eight thousand, five hundred one".