116947921 has 2 divisors, whose sum is σ = 116947922. Its totient is φ = 116947920.

The previous prime is 116947849. The next prime is 116947933. The reversal of 116947921 is 129749611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 45037521 = 8480^2 + 6711^2 .

It is an emirp because it is prime and its reverse (129749611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116947921 - 2⁹ = 116947409 is a prime.

It is not a weakly prime, because it can be changed into another prime (116947991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58473960 + 58473961.

It is an arithmetic number, because the mean of its divisors is an integer number (58473961).

Almost surely, 2^116947921 is an apocalyptic number.

It is an amenable number.

116947921 is a deficient number, since it is larger than the sum of its proper divisors (1).

116947921 is an equidigital number, since it uses as much as digits as its factorization.

116947921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 116947921 is about 10814.2462058157. The cubic root of 116947921 is about 489.0247449363.

The spelling of 116947921 in words is "one hundred sixteen million, nine hundred forty-seven thousand, nine hundred twenty-one".