11870813 has 2 divisors, whose sum is σ = 11870814. Its totient is φ = 11870812.

The previous prime is 11870797. The next prime is 11870819. The reversal of 11870813 is 31807811.

11870813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10876804 + 994009 = 3298^2 + 997^2 .

It is a cyclic number.

It is not a de Polignac number, because 11870813 - 2⁴ = 11870797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11870819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5935406 + 5935407.

It is an arithmetic number, because the mean of its divisors is an integer number (5935407).

Almost surely, 2^11870813 is an apocalyptic number.

It is an amenable number.

11870813 is a deficient number, since it is larger than the sum of its proper divisors (1).

11870813 is an equidigital number, since it uses as much as digits as its factorization.

11870813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 11870813 is about 3445.4046206505. The cubic root of 11870813 is about 228.1183147600.

The spelling of 11870813 in words is "eleven million, eight hundred seventy thousand, eight hundred thirteen".