5311391 has 2 divisors, whose sum is σ = 5311392. Its totient is φ = 5311390.

The previous prime is 5311381. The next prime is 5311409. The reversal of 5311391 is 1931135.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5311391 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5311301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2655695 + 2655696.

It is an arithmetic number, because the mean of its divisors is an integer number (2655696).

Almost surely, 2^5311391 is an apocalyptic number.

5311391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5311391 is an equidigital number, since it uses as much as digits as its factorization.

5311391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405, while the sum is 23.

The square root of 5311391 is about 2304.6455258890. The cubic root of 5311391 is about 174.4761586791.

The spelling of 5311391 in words is "five million, three hundred eleven thousand, three hundred ninety-one".