116721643 has 8 divisors (see below), whose sum is σ = 126928512. Its totient is φ = 106886016.

The previous prime is 116721637. The next prime is 116721667. The reversal of 116721643 is 346127611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 116721643 - 2²⁵ = 83167211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116721623) 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 in 7 ways as a sum of consecutive naturals, for example, 92155 + ... + 93412.

It is an arithmetic number, because the mean of its divisors is an integer number (15866064).

Almost surely, 2^116721643 is an apocalyptic number.

116721643 is a deficient number, since it is larger than the sum of its proper divisors (10206869).

116721643 is a wasteful number, since it uses less digits than its factorization.

116721643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185621.

The product of its digits is 6048, while the sum is 31.

The square root of 116721643 is about 10803.7791073309. The cubic root of 116721643 is about 488.7091429578.

The spelling of 116721643 in words is "one hundred sixteen million, seven hundred twenty-one thousand, six hundred forty-three".