3124131391 has 2 divisors, whose sum is σ = 3124131392. Its totient is φ = 3124131390.

The previous prime is 3124131389. The next prime is 3124131403. The reversal of 3124131391 is 1931314213.

It is a weak prime.

It is an emirp because it is prime and its reverse (1931314213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3124131391 - 2¹ = 3124131389 is a prime.

Together with 3124131389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3124131341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1562065695 + 1562065696.

It is an arithmetic number, because the mean of its divisors is an integer number (1562065696).

Almost surely, 2^3124131391 is an apocalyptic number.

3124131391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3124131391 is an equidigital number, since it uses as much as digits as its factorization.

3124131391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 3124131391 is about 55893.9298224771. The cubic root of 3124131391 is about 1461.8733990542.

The spelling of 3124131391 in words is "three billion, one hundred twenty-four million, one hundred thirty-one thousand, three hundred ninety-one".