116178721 has 2 divisors, whose sum is σ = 116178722. Its totient is φ = 116178720.

The previous prime is 116178719. The next prime is 116178757. The reversal of 116178721 is 127871611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60840000 + 55338721 = 7800^2 + 7439^2 .

It is a cyclic number.

It is not a de Polignac number, because 116178721 - 2¹ = 116178719 is a prime.

Together with 116178719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (116178761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58089360 + 58089361.

It is an arithmetic number, because the mean of its divisors is an integer number (58089361).

Almost surely, 2^116178721 is an apocalyptic number.

It is an amenable number.

116178721 is a deficient number, since it is larger than the sum of its proper divisors (1).

116178721 is an equidigital number, since it uses as much as digits as its factorization.

116178721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 34.

The square root of 116178721 is about 10778.6233351018. The cubic root of 116178721 is about 487.9502337161.

The spelling of 116178721 in words is "one hundred sixteen million, one hundred seventy-eight thousand, seven hundred twenty-one".