195071389 has 4 divisors (see below), whose sum is σ = 195111520. Its totient is φ = 195031260.

The previous prime is 195071377. The next prime is 195071407. The reversal of 195071389 is 983170591.

195071389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 195071389 - 2⁹ = 195070877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195071369) 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, 11577 + ... + 22894.

It is an arithmetic number, because the mean of its divisors is an integer number (48777880).

Almost surely, 2^195071389 is an apocalyptic number.

It is an amenable number.

195071389 is a deficient number, since it is larger than the sum of its proper divisors (40131).

195071389 is an equidigital number, since it uses as much as digits as its factorization.

195071389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40130.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 195071389 is about 13966.7959461002. The cubic root of 195071389 is about 579.9597564230.

The spelling of 195071389 in words is "one hundred ninety-five million, seventy-one thousand, three hundred eighty-nine".