194306299139 has 4 divisors (see below), whose sum is σ = 197206393224. Its totient is φ = 191406205056.

The previous prime is 194306299127. The next prime is 194306299171. The reversal of 194306299139 is 931992603491.

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

It is a cyclic number.

It is not a de Polignac number, because 194306299139 - 2²⁰ = 194305250563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194306299339) 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, 1450046942 + ... + 1450047075.

It is an arithmetic number, because the mean of its divisors is an integer number (49301598306).

Almost surely, 2^194306299139 is an apocalyptic number.

194306299139 is a deficient number, since it is larger than the sum of its proper divisors (2900094085).

194306299139 is an equidigital number, since it uses as much as digits as its factorization.

194306299139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900094084.

The product of its (nonzero) digits is 2834352, while the sum is 56.

The spelling of 194306299139 in words is "one hundred ninety-four billion, three hundred six million, two hundred ninety-nine thousand, one hundred thirty-nine".