195457689 has 12 divisors (see below), whose sum is σ = 322660416. Its totient is φ = 111690072.

The previous prime is 195457681. The next prime is 195457711. The reversal of 195457689 is 986754591.

195457689 is a `hidden beast` number, since 19 + 54 + 576 + 8 + 9 = 666.

It is not a de Polignac number, because 195457689 - 2³ = 195457681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195457681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1551189 + ... + 1551314.

It is an arithmetic number, because the mean of its divisors is an integer number (26888368).

Almost surely, 2^195457689 is an apocalyptic number.

It is an amenable number.

195457689 is a deficient number, since it is larger than the sum of its proper divisors (127202727).

195457689 is a wasteful number, since it uses less digits than its factorization.

195457689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102516 (or 3102513 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 195457689 is about 13980.6183339651. The cubic root of 195457689 is about 580.3423355558.

The spelling of 195457689 in words is "one hundred ninety-five million, four hundred fifty-seven thousand, six hundred eighty-nine".