116868561 has 4 divisors (see below), whose sum is σ = 155824752. Its totient is φ = 77912372.

The previous prime is 116868541. The next prime is 116868611. The reversal of 116868561 is 165868611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 116868561 - 2¹¹ = 116866513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (116868511) 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, 19478091 + ... + 19478096.

It is an arithmetic number, because the mean of its divisors is an integer number (38956188).

Almost surely, 2^116868561 is an apocalyptic number.

It is an amenable number.

116868561 is a deficient number, since it is larger than the sum of its proper divisors (38956191).

116868561 is an equidigital number, since it uses as much as digits as its factorization.

116868561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38956190.

The product of its digits is 69120, while the sum is 42.

The square root of 116868561 is about 10810.5763491129. The cubic root of 116868561 is about 488.9141037060.

Subtracting 116868561 from its reverse (165868611), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 116868561 in words is "one hundred sixteen million, eight hundred sixty-eight thousand, five hundred sixty-one".