11431813 has 2 divisors, whose sum is σ = 11431814. Its totient is φ = 11431812.

The previous prime is 11431807. The next prime is 11431817. The reversal of 11431813 is 31813411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6315169 + 5116644 = 2513^2 + 2262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11431813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11431817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715906 + 5715907.

It is an arithmetic number, because the mean of its divisors is an integer number (5715907).

Almost surely, 2^11431813 is an apocalyptic number.

It is an amenable number.

11431813 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431813 is an equidigital number, since it uses as much as digits as its factorization.

11431813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

The square root of 11431813 is about 3381.0964198023. The cubic root of 11431813 is about 225.2708704844.

The spelling of 11431813 in words is "eleven million, four hundred thirty-one thousand, eight hundred thirteen".