11543957 has 2 divisors, whose sum is σ = 11543958. Its totient is φ = 11543956.

The previous prime is 11543947. The next prime is 11543971. The reversal of 11543957 is 75934511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11464996 + 78961 = 3386^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 11543957 - 2⁴ = 11543941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11543947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771978 + 5771979.

It is an arithmetic number, because the mean of its divisors is an integer number (5771979).

Almost surely, 2^11543957 is an apocalyptic number.

It is an amenable number.

11543957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543957 is an equidigital number, since it uses as much as digits as its factorization.

11543957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 35.

The square root of 11543957 is about 3397.6399161771. The cubic root of 11543957 is about 226.0050968647.

The spelling of 11543957 in words is "eleven million, five hundred forty-three thousand, nine hundred fifty-seven".