11671931 has 4 divisors (see below), whose sum is σ = 11682264. Its totient is φ = 11661600.

The previous prime is 11671927. The next prime is 11671937. The reversal of 11671931 is 13917611.

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: 13917611 = 17 ⋅818683.

It is a cyclic number.

It is not a de Polignac number, because 11671931 - 2² = 11671927 is a prime.

It is a super-2 number, since 2×11671931² = 272467946537522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 11671894 and 11671903.

It is not an unprimeable number, because it can be changed into a prime (11671937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3230 + ... + 5811.

It is an arithmetic number, because the mean of its divisors is an integer number (2920566).

Almost surely, 2^11671931 is an apocalyptic number.

11671931 is a deficient number, since it is larger than the sum of its proper divisors (10333).

11671931 is an equidigital number, since it uses as much as digits as its factorization.

11671931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332.

The product of its digits is 1134, while the sum is 29.

The square root of 11671931 is about 3416.4207879007. The cubic root of 11671931 is about 226.8371787439.

The spelling of 11671931 in words is "eleven million, six hundred seventy-one thousand, nine hundred thirty-one".