3891268939 has 2 divisors, whose sum is σ = 3891268940. Its totient is φ = 3891268938.

The previous prime is 3891268937. The next prime is 3891268967. The reversal of 3891268939 is 9398621983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3891268939 - 2¹ = 3891268937 is a prime.

Together with 3891268937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3891268937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945634469 + 1945634470.

It is an arithmetic number, because the mean of its divisors is an integer number (1945634470).

Almost surely, 2^3891268939 is an apocalyptic number.

3891268939 is a deficient number, since it is larger than the sum of its proper divisors (1).

3891268939 is an equidigital number, since it uses as much as digits as its factorization.

3891268939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 58.

The square root of 3891268939 is about 62380.0363818425. The cubic root of 3891268939 is about 1572.8854046263.

The spelling of 3891268939 in words is "three billion, eight hundred ninety-one million, two hundred sixty-eight thousand, nine hundred thirty-nine".