11155957 has 2 divisors, whose sum is σ = 11155958. Its totient is φ = 11155956.

The previous prime is 11155951. The next prime is 11155973. The reversal of 11155957 is 75955111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 40401 = 3334^2 + 201^2 .

It is an emirp because it is prime and its reverse (75955111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11155957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577978 + 5577979.

It is an arithmetic number, because the mean of its divisors is an integer number (5577979).

Almost surely, 2^11155957 is an apocalyptic number.

It is an amenable number.

11155957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155957 is an equidigital number, since it uses as much as digits as its factorization.

11155957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7875, while the sum is 34.

The square root of 11155957 is about 3340.0534426862. The cubic root of 11155957 is about 223.4441268545. Note that the first 3 decimals are identical.

The spelling of 11155957 in words is "eleven million, one hundred fifty-five thousand, nine hundred fifty-seven".