194142279 has 4 divisors (see below), whose sum is σ = 258856376. Its totient is φ = 129428184.

The previous prime is 194142253. The next prime is 194142281. The reversal of 194142279 is 972241491.

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

It is not a de Polignac number, because 194142279 - 2⁹ = 194141767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194192279) 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, 32357044 + ... + 32357049.

It is an arithmetic number, because the mean of its divisors is an integer number (64714094).

Almost surely, 2^194142279 is an apocalyptic number.

194142279 is a deficient number, since it is larger than the sum of its proper divisors (64714097).

194142279 is an equidigital number, since it uses as much as digits as its factorization.

194142279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64714096.

The product of its digits is 36288, while the sum is 39.

The square root of 194142279 is about 13933.4948595103. The cubic root of 194142279 is about 579.0375228113.

The spelling of 194142279 in words is "one hundred ninety-four million, one hundred forty-two thousand, two hundred seventy-nine".