11138287 has 2 divisors, whose sum is σ = 11138288. Its totient is φ = 11138286.

The previous prime is 11138273. The next prime is 11138293. The reversal of 11138287 is 78283111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11138287 - 2⁷ = 11138159 is a prime.

It is a super-2 number, since 2×11138287² = 248122874588738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11138087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5569143 + 5569144.

It is an arithmetic number, because the mean of its divisors is an integer number (5569144).

Almost surely, 2^11138287 is an apocalyptic number.

11138287 is a deficient number, since it is larger than the sum of its proper divisors (1).

11138287 is an equidigital number, since it uses as much as digits as its factorization.

11138287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 31.

The square root of 11138287 is about 3337.4072271750. The cubic root of 11138287 is about 223.3260929313.

The spelling of 11138287 in words is "eleven million, one hundred thirty-eight thousand, two hundred eighty-seven".