116781589 has 2 divisors, whose sum is σ = 116781590. Its totient is φ = 116781588.

The previous prime is 116781547. The next prime is 116781641. The reversal of 116781589 is 985187611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102212100 + 14569489 = 10110^2 + 3817^2 .

It is an emirp because it is prime and its reverse (985187611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116781589 - 2⁷ = 116781461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116781089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58390794 + 58390795.

It is an arithmetic number, because the mean of its divisors is an integer number (58390795).

Almost surely, 2^116781589 is an apocalyptic number.

It is an amenable number.

116781589 is a deficient number, since it is larger than the sum of its proper divisors (1).

116781589 is an equidigital number, since it uses as much as digits as its factorization.

116781589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 46.

The square root of 116781589 is about 10806.5530582143. The cubic root of 116781589 is about 488.7927925239.

It can be divided in two parts, 116781 and 589, that added together give a triangular number (117370 = T₄₈₄).

The spelling of 116781589 in words is "one hundred sixteen million, seven hundred eighty-one thousand, five hundred eighty-nine".