195394657 has 4 divisors (see below), whose sum is σ = 195454000. Its totient is φ = 195335316.

The previous prime is 195394649. The next prime is 195394691. The reversal of 195394657 is 756493591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195394657 - 2³ = 195394649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195394657.

It is not an unprimeable number, because it can be changed into a prime (195394697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24423 + ... + 31420.

It is an arithmetic number, because the mean of its divisors is an integer number (48863500).

Almost surely, 2^195394657 is an apocalyptic number.

It is an amenable number.

195394657 is a deficient number, since it is larger than the sum of its proper divisors (59343).

195394657 is an equidigital number, since it uses as much as digits as its factorization.

195394657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59342.

The product of its digits is 1020600, while the sum is 49.

The square root of 195394657 is about 13978.3638885243. The cubic root of 195394657 is about 580.2799451204.

The spelling of 195394657 in words is "one hundred ninety-five million, three hundred ninety-four thousand, six hundred fifty-seven".