116643187 has 2 divisors, whose sum is σ = 116643188. Its totient is φ = 116643186.

The previous prime is 116643169. The next prime is 116643193. The reversal of 116643187 is 781346611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 116643187 - 2²³ = 108254579 is a prime.

It is not a weakly prime, because it can be changed into another prime (116643287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58321593 + 58321594.

It is an arithmetic number, because the mean of its divisors is an integer number (58321594).

Almost surely, 2^116643187 is an apocalyptic number.

116643187 is a deficient number, since it is larger than the sum of its proper divisors (1).

116643187 is an equidigital number, since it uses as much as digits as its factorization.

116643187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 116643187 is about 10800.1475452884. The cubic root of 116643187 is about 488.5996209717.

Adding to 116643187 its reverse (781346611), we get a palindrome (897989798).

The spelling of 116643187 in words is "one hundred sixteen million, six hundred forty-three thousand, one hundred eighty-seven".