195038138 has 4 divisors (see below), whose sum is σ = 292557210. Its totient is φ = 97519068.

The previous prime is 195038099. The next prime is 195038141. The reversal of 195038138 is 831830591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 163149529 + 31888609 = 12773^2 + 5647^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48759533 + ... + 48759536.

Almost surely, 2^195038138 is an apocalyptic number.

195038138 is a deficient number, since it is larger than the sum of its proper divisors (97519072).

195038138 is an equidigital number, since it uses as much as digits as its factorization.

195038138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97519071.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 195038138 is about 13965.6055364599. The cubic root of 195038138 is about 579.9268020983.

The spelling of 195038138 in words is "one hundred ninety-five million, thirty-eight thousand, one hundred thirty-eight".