195151789 has 16 divisors (see below), whose sum is σ = 243772416. Its totient is φ = 152352000.

The previous prime is 195151787. The next prime is 195151799. The reversal of 195151789 is 987151591.

It is a cyclic number.

It is not a de Polignac number, because 195151789 - 2¹ = 195151787 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 (195151787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22762 + ... + 30139.

It is an arithmetic number, because the mean of its divisors is an integer number (15235776).

Almost surely, 2^195151789 is an apocalyptic number.

It is an amenable number.

195151789 is a deficient number, since it is larger than the sum of its proper divisors (48620627).

195151789 is a wasteful number, since it uses less digits than its factorization.

195151789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52956.

The product of its digits is 113400, while the sum is 46.

The square root of 195151789 is about 13969.6739045691. The cubic root of 195151789 is about 580.0394235985.

The spelling of 195151789 in words is "one hundred ninety-five million, one hundred fifty-one thousand, seven hundred eighty-nine".