116781587 has 4 divisors (see below), whose sum is σ = 125764800. Its totient is φ = 107798376.

The previous prime is 116781547. The next prime is 116781589. The reversal of 116781587 is 785187611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 116781587 - 2⁶ = 116781523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116781589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4491587 + ... + 4491612.

It is an arithmetic number, because the mean of its divisors is an integer number (31441200).

Almost surely, 2^116781587 is an apocalyptic number.

116781587 is a deficient number, since it is larger than the sum of its proper divisors (8983213).

116781587 is an equidigital number, since it uses as much as digits as its factorization.

116781587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8983212.

The product of its digits is 94080, while the sum is 44.

The square root of 116781587 is about 10806.5529656778. The cubic root of 116781587 is about 488.7927897336.

The spelling of 116781587 in words is "one hundred sixteen million, seven hundred eighty-one thousand, five hundred eighty-seven".