116719861 has 2 divisors, whose sum is σ = 116719862. Its totient is φ = 116719860.

The previous prime is 116719859. The next prime is 116719873. The reversal of 116719861 is 168917611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95844100 + 20875761 = 9790^2 + 4569^2 .

It is an emirp because it is prime and its reverse (168917611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116719861 - 2¹ = 116719859 is a prime.

Together with 116719859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116710861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58359930 + 58359931.

It is an arithmetic number, because the mean of its divisors is an integer number (58359931).

Almost surely, 2^116719861 is an apocalyptic number.

It is an amenable number.

116719861 is a deficient number, since it is larger than the sum of its proper divisors (1).

116719861 is an equidigital number, since it uses as much as digits as its factorization.

116719861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 40.

The square root of 116719861 is about 10803.6966358742. The cubic root of 116719861 is about 488.7066558894.

The spelling of 116719861 in words is "one hundred sixteen million, seven hundred nineteen thousand, eight hundred sixty-one".