11155973 has 2 divisors, whose sum is σ = 11155974. Its totient is φ = 11155972.

The previous prime is 11155957. The next prime is 11155993. The reversal of 11155973 is 37955111.

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., 7941124 + 3214849 = 2818^2 + 1793^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155973 - 2⁴ = 11155957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577986 + 5577987.

It is an arithmetic number, because the mean of its divisors is an integer number (5577987).

Almost surely, 2^11155973 is an apocalyptic number.

It is an amenable number.

11155973 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155973 is an equidigital number, since it uses as much as digits as its factorization.

11155973 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 11155973 is about 3340.0558378566. The cubic root of 11155973 is about 223.4442336765. Note that the first 3 decimals are identical.

The spelling of 11155973 in words is "eleven million, one hundred fifty-five thousand, nine hundred seventy-three".