4391194939 has 4 divisors (see below), whose sum is σ = 4391332000. Its totient is φ = 4391057880.

The previous prime is 4391194933. The next prime is 4391194961. The reversal of 4391194939 is 9394911934.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9394911934 = 2 ⋅4697455967.

It is a cyclic number.

It is not a de Polignac number, because 4391194939 - 2⁷ = 4391194811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4391194933) 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, 8062 + ... + 94060.

It is an arithmetic number, because the mean of its divisors is an integer number (1097833000).

Almost surely, 2^4391194939 is an apocalyptic number.

4391194939 is a deficient number, since it is larger than the sum of its proper divisors (137061).

4391194939 is an equidigital number, since it uses as much as digits as its factorization.

4391194939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137060.

The product of its digits is 944784, while the sum is 52.

The square root of 4391194939 is about 66266.0919249053. The cubic root of 4391194939 is about 1637.5487546348.

The spelling of 4391194939 in words is "four billion, three hundred ninety-one million, one hundred ninety-four thousand, nine hundred thirty-nine".