133687111 has 2 divisors, whose sum is σ = 133687112. Its totient is φ = 133687110.

The previous prime is 133687087. The next prime is 133687117. The reversal of 133687111 is 111786331.

It is a strong prime.

It is an emirp because it is prime and its reverse (111786331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133687111 - 2¹¹ = 133685063 is a prime.

It is equal to p_7575250 and since 133687111 and 7575250 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 (133687117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66843555 + 66843556.

It is an arithmetic number, because the mean of its divisors is an integer number (66843556).

Almost surely, 2^133687111 is an apocalyptic number.

133687111 is a deficient number, since it is larger than the sum of its proper divisors (1).

133687111 is an equidigital number, since it uses as much as digits as its factorization.

133687111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 133687111 is about 11562.3142579676. The cubic root of 133687111 is about 511.3243944959.

The spelling of 133687111 in words is "one hundred thirty-three million, six hundred eighty-seven thousand, one hundred eleven".