194143959 has 10 divisors (see below), whose sum is σ = 290017640. Its totient is φ = 129429252.

The previous prime is 194143949. The next prime is 194143987. The reversal of 194143959 is 959341491.

It is a de Polignac number, because none of the positive numbers 2^k-194143959 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 (194143909) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1198339 + ... + 1198500.

It is an arithmetic number, because the mean of its divisors is an integer number (29001764).

Almost surely, 2^194143959 is an apocalyptic number.

194143959 is a deficient number, since it is larger than the sum of its proper divisors (95873681).

194143959 is an equidigital number, since it uses as much as digits as its factorization.

194143959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396851 (or 2396842 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 194143959 is about 13933.5551457623. Note that the first 3 decimals coincide. The cubic root of 194143959 is about 579.0391930300.

The spelling of 194143959 in words is "one hundred ninety-four million, one hundred forty-three thousand, nine hundred fifty-nine".