118917587 has 2 divisors, whose sum is σ = 118917588. Its totient is φ = 118917586.

The previous prime is 118917559. The next prime is 118917607. The reversal of 118917587 is 785719811.

It is a strong prime.

It is an emirp because it is prime and its reverse (785719811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118917587 - 2¹⁰ = 118916563 is a prime.

It is not a weakly prime, because it can be changed into another prime (118917187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59458793 + 59458794.

It is an arithmetic number, because the mean of its divisors is an integer number (59458794).

Almost surely, 2^118917587 is an apocalyptic number.

118917587 is a deficient number, since it is larger than the sum of its proper divisors (1).

118917587 is an equidigital number, since it uses as much as digits as its factorization.

118917587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 47.

The square root of 118917587 is about 10904.9340667424. The cubic root of 118917587 is about 491.7549000065.

The spelling of 118917587 in words is "one hundred eighteen million, nine hundred seventeen thousand, five hundred eighty-seven".