118642087 has 2 divisors, whose sum is σ = 118642088. Its totient is φ = 118642086.

The previous prime is 118642067. The next prime is 118642123. The reversal of 118642087 is 780246811.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118642087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118642067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59321043 + 59321044.

It is an arithmetic number, because the mean of its divisors is an integer number (59321044).

Almost surely, 2^118642087 is an apocalyptic number.

118642087 is a deficient number, since it is larger than the sum of its proper divisors (1).

118642087 is an equidigital number, since it uses as much as digits as its factorization.

118642087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 118642087 is about 10892.2948454401. The cubic root of 118642087 is about 491.3748518414.

Adding to 118642087 its reverse (780246811), we get a palindrome (898888898).

The spelling of 118642087 in words is "one hundred eighteen million, six hundred forty-two thousand, eighty-seven".