11713421 has 2 divisors, whose sum is σ = 11713422. Its totient is φ = 11713420.

The previous prime is 11713369. The next prime is 11713439. The reversal of 11713421 is 12431711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8491396 + 3222025 = 2914^2 + 1795^2 .

It is an emirp because it is prime and its reverse (12431711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11713421 - 2¹⁰ = 11712397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11713393 and 11713402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11713441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5856710 + 5856711.

It is an arithmetic number, because the mean of its divisors is an integer number (5856711).

Almost surely, 2^11713421 is an apocalyptic number.

It is an amenable number.

11713421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11713421 is an equidigital number, since it uses as much as digits as its factorization.

11713421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 20.

The square root of 11713421 is about 3422.4875456311. The cubic root of 11713421 is about 227.1056388904.

The spelling of 11713421 in words is "eleven million, seven hundred thirteen thousand, four hundred twenty-one".