195424789 has 12 divisors (see below), whose sum is σ = 228319884. Its totient is φ = 166778304.

The previous prime is 195424783. The next prime is 195424793. The reversal of 195424789 is 987424591.

It can be written as a sum of positive squares in 2 ways, for example, as 11957764 + 183467025 = 3458^2 + 13545^2 .

It is not a de Polignac number, because 195424789 - 2³ = 195424781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195424781) 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, 2859 + ... + 19975.

It is an arithmetic number, because the mean of its divisors is an integer number (19026657).

Almost surely, 2^195424789 is an apocalyptic number.

It is an amenable number.

195424789 is a deficient number, since it is larger than the sum of its proper divisors (32895095).

195424789 is a wasteful number, since it uses less digits than its factorization.

195424789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17364 (or 17357 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The square root of 195424789 is about 13979.4416555169. The cubic root of 195424789 is about 580.3097720987.

The spelling of 195424789 in words is "one hundred ninety-five million, four hundred twenty-four thousand, seven hundred eighty-nine".