195381729 has 12 divisors (see below), whose sum is σ = 291950100. Its totient is φ = 125762784.

The previous prime is 195381727. The next prime is 195381733. The reversal of 195381729 is 927183591.

195381729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 71571600 + 123810129 = 8460^2 + 11127^2 .

It is not a de Polignac number, because 195381729 - 2¹ = 195381727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195381721) 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, 374034 + ... + 374555.

It is an arithmetic number, because the mean of its divisors is an integer number (24329175).

Almost surely, 2^195381729 is an apocalyptic number.

It is an amenable number.

195381729 is a deficient number, since it is larger than the sum of its proper divisors (96568371).

195381729 is a wasteful number, since it uses less digits than its factorization.

195381729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748624 (or 748621 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 195381729 is about 13977.9014519348. The cubic root of 195381729 is about 580.2671470486.

It can be divided in two parts, 195 and 381729, that added together give a square (381924 = 618²).

The spelling of 195381729 in words is "one hundred ninety-five million, three hundred eighty-one thousand, seven hundred twenty-nine".