11709517 has 2 divisors, whose sum is σ = 11709518. Its totient is φ = 11709516.

The previous prime is 11709487. The next prime is 11709541. The reversal of 11709517 is 71590711.

11709517 is digitally balanced in base 2 and base 3, because in such bases 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., 8590761 + 3118756 = 2931^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 11709517 - 2²³ = 3320909 is a prime.

It is a super-2 number, since 2×11709517² = 274225576746578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11709547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5854758 + 5854759.

It is an arithmetic number, because the mean of its divisors is an integer number (5854759).

Almost surely, 2^11709517 is an apocalyptic number.

It is an amenable number.

11709517 is a deficient number, since it is larger than the sum of its proper divisors (1).

11709517 is an equidigital number, since it uses as much as digits as its factorization.

11709517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2205, while the sum is 31.

The square root of 11709517 is about 3421.9171527084. The cubic root of 11709517 is about 227.0804051881.

The spelling of 11709517 in words is "eleven million, seven hundred nine thousand, five hundred seventeen".