11213957 has 2 divisors, whose sum is σ = 11213958. Its totient is φ = 11213956.

The previous prime is 11213843. The next prime is 11213977. The reversal of 11213957 is 75931211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10982596 + 231361 = 3314^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213957 - 2¹⁸ = 10951813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11213977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606978 + 5606979.

It is an arithmetic number, because the mean of its divisors is an integer number (5606979).

Almost surely, 2^11213957 is an apocalyptic number.

It is an amenable number.

11213957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11213957 is an equidigital number, since it uses as much as digits as its factorization.

11213957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 29.

The square root of 11213957 is about 3348.7246826217. The cubic root of 11213957 is about 223.8306875853.

The spelling of 11213957 in words is "eleven million, two hundred thirteen thousand, nine hundred fifty-seven".