195961390 has 8 divisors (see below), whose sum is σ = 352730520. Its totient is φ = 78384552.

The previous prime is 195961387. The next prime is 195961391. The reversal of 195961390 is 93169591.

195961390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195961391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9798060 + ... + 9798079.

It is an arithmetic number, because the mean of its divisors is an integer number (44091315).

Almost surely, 2^195961390 is an apocalyptic number.

195961390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195961390 is a deficient number, since it is larger than the sum of its proper divisors (156769130).

195961390 is a wasteful number, since it uses less digits than its factorization.

195961390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19596146.

The product of its (nonzero) digits is 65610, while the sum is 43.

The square root of 195961390 is about 13998.6210035132. The cubic root of 195961390 is about 580.8404284677.

The spelling of 195961390 in words is "one hundred ninety-five million, nine hundred sixty-one thousand, three hundred ninety".