11957513 has 2 divisors, whose sum is σ = 11957514. Its totient is φ = 11957512.

The previous prime is 11957509. The next prime is 11957521. The reversal of 11957513 is 31575911.

It is a happy number.

11957513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11916304 + 41209 = 3452^2 + 203^2 .

It is a cyclic number.

It is not a de Polignac number, because 11957513 - 2² = 11957509 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 11957513.

It is not a weakly prime, because it can be changed into another prime (11957563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5978756 + 5978757.

It is an arithmetic number, because the mean of its divisors is an integer number (5978757).

Almost surely, 2^11957513 is an apocalyptic number.

It is an amenable number.

11957513 is a deficient number, since it is larger than the sum of its proper divisors (1).

11957513 is an equidigital number, since it uses as much as digits as its factorization.

11957513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4725, while the sum is 32.

The square root of 11957513 is about 3457.9637071548. The cubic root of 11957513 is about 228.6723319189.

The spelling of 11957513 in words is "eleven million, nine hundred fifty-seven thousand, five hundred thirteen".