11931371 has 2 divisors, whose sum is σ = 11931372. Its totient is φ = 11931370.

The previous prime is 11931341. The next prime is 11931397. The reversal of 11931371 is 17313911.

It is an a-pointer prime, because the next prime (11931397) can be obtained adding 11931371 to its sum of digits (26).

It is a strong prime.

It is an emirp because it is prime and its reverse (17313911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11931371 - 2¹⁸ = 11669227 is a prime.

It is a super-2 number, since 2×11931371² = 284715227879282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11931371.

It is not a weakly prime, because it can be changed into another prime (11931341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5965685 + 5965686.

It is an arithmetic number, because the mean of its divisors is an integer number (5965686).

Almost surely, 2^11931371 is an apocalyptic number.

11931371 is a deficient number, since it is larger than the sum of its proper divisors (1).

11931371 is an equidigital number, since it uses as much as digits as its factorization.

11931371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 567, while the sum is 26.

The square root of 11931371 is about 3454.1816686445. The cubic root of 11931371 is about 228.5055660869.

The spelling of 11931371 in words is "eleven million, nine hundred thirty-one thousand, three hundred seventy-one".