106967721 has 16 divisors (see below), whose sum is σ = 164444544. Its totient is φ = 60582144.

The previous prime is 106967719. The next prime is 106967743. The reversal of 106967721 is 127769601.

It is not a de Polignac number, because 106967721 - 2¹ = 106967719 is a prime.

It is a super-2 number, since 2×106967721² = 22884186671867682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 106967721.

It is not an unprimeable number, because it can be changed into a prime (106967771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20166 + ... + 24911.

It is an arithmetic number, because the mean of its divisors is an integer number (10277784).

Almost surely, 2^106967721 is an apocalyptic number.

It is an amenable number.

106967721 is a deficient number, since it is larger than the sum of its proper divisors (57476823).

106967721 is a wasteful number, since it uses less digits than its factorization.

106967721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45200.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 106967721 is about 10342.5200507420. The cubic root of 106967721 is about 474.6981957233.

The spelling of 106967721 in words is "one hundred six million, nine hundred sixty-seven thousand, seven hundred twenty-one".