106916721 has 8 divisors (see below), whose sum is σ = 142879200. Its totient is φ = 71116032.

The previous prime is 106916687. The next prime is 106916779. The reversal of 106916721 is 127619601.

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

It is not a de Polignac number, because 106916721 - 2⁹ = 106916209 is a prime.

It is a super-2 number, since 2×106916721² = 22862370458783682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106916221) 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, 38896 + ... + 41553.

It is an arithmetic number, because the mean of its divisors is an integer number (17859900).

Almost surely, 2^106916721 is an apocalyptic number.

It is an amenable number.

106916721 is a deficient number, since it is larger than the sum of its proper divisors (35962479).

106916721 is an equidigital number, since it uses as much as digits as its factorization.

106916721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80895.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 106916721 is about 10340.0542068212. The cubic root of 106916721 is about 474.6227416320.

The spelling of 106916721 in words is "one hundred six million, nine hundred sixteen thousand, seven hundred twenty-one".