194880039 has 4 divisors (see below), whose sum is σ = 259840056. Its totient is φ = 129920024.

The previous prime is 194879987. The next prime is 194880041. The reversal of 194880039 is 930088491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930088491 = 3 ⋅310029497.

It is a cyclic number.

It is not a de Polignac number, because 194880039 - 2⁹ = 194879527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194880239) 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, 32480004 + ... + 32480009.

It is an arithmetic number, because the mean of its divisors is an integer number (64960014).

Almost surely, 2^194880039 is an apocalyptic number.

194880039 is a deficient number, since it is larger than the sum of its proper divisors (64960017).

194880039 is an equidigital number, since it uses as much as digits as its factorization.

194880039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64960016.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 194880039 is about 13959.9440901459. The cubic root of 194880039 is about 579.7700624417.

The spelling of 194880039 in words is "one hundred ninety-four million, eight hundred eighty thousand, thirty-nine".