11890031 has 2 divisors, whose sum is σ = 11890032. Its totient is φ = 11890030.

The previous prime is 11890027. The next prime is 11890049. The reversal of 11890031 is 13009811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11890031 - 2² = 11890027 is a prime.

It is a super-2 number, since 2×11890031² = 282745674361922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11889979 and 11890006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11890001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945015 + 5945016.

It is an arithmetic number, because the mean of its divisors is an integer number (5945016).

Almost surely, 2^11890031 is an apocalyptic number.

11890031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11890031 is an equidigital number, since it uses as much as digits as its factorization.

11890031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 11890031 is about 3448.1924250250. The cubic root of 11890031 is about 228.2413508182.

Adding to 11890031 its reverse (13009811), we get a palindrome (24899842).

The spelling of 11890031 in words is "eleven million, eight hundred ninety thousand, thirty-one".