11538557 has 2 divisors, whose sum is σ = 11538558. Its totient is φ = 11538556.

The previous prime is 11538533. The next prime is 11538601. The reversal of 11538557 is 75583511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11519236 + 19321 = 3394^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 11538557 - 2⁶ = 11538493 is a prime.

It is a Chen prime.

It is equal to p₇₅₉₆₇₁ and since 11538557 and 759671 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11588557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5769278 + 5769279.

It is an arithmetic number, because the mean of its divisors is an integer number (5769279).

Almost surely, 2^11538557 is an apocalyptic number.

It is an amenable number.

11538557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11538557 is an equidigital number, since it uses as much as digits as its factorization.

11538557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 35.

The square root of 11538557 is about 3396.8451539627. The cubic root of 11538557 is about 225.9698513572.

The spelling of 11538557 in words is "eleven million, five hundred thirty-eight thousand, five hundred fifty-seven".