11431919 has 2 divisors, whose sum is σ = 11431920. Its totient is φ = 11431918.

The previous prime is 11431913. The next prime is 11431921. The reversal of 11431919 is 91913411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11431919 - 2²⁰ = 10383343 is a prime.

It is a super-2 number, since 2×11431919² = 261377544045122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 11431921, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₇₅₃₀₈₆ and since 11431919 and 753086 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 11431891 and 11431900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11431913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715959 + 5715960.

It is an arithmetic number, because the mean of its divisors is an integer number (5715960).

Almost surely, 2^11431919 is an apocalyptic number.

11431919 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431919 is an equidigital number, since it uses as much as digits as its factorization.

11431919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 29.

The square root of 11431919 is about 3381.1120951545. The cubic root of 11431919 is about 225.2715667472.

The spelling of 11431919 in words is "eleven million, four hundred thirty-one thousand, nine hundred nineteen".