106721699 has 16 divisors (see below), whose sum is σ = 130411008. Its totient is φ = 85249152.

The previous prime is 106721683. The next prime is 106721707. The reversal of 106721699 is 996127601.

It is not a de Polignac number, because 106721699 - 2⁴ = 106721683 is a prime.

It is a super-2 number, since 2×106721699² = 22779042074893202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (106721899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7904 + ... + 16610.

It is an arithmetic number, because the mean of its divisors is an integer number (8150688).

Almost surely, 2^106721699 is an apocalyptic number.

106721699 is a deficient number, since it is larger than the sum of its proper divisors (23689309).

106721699 is a wasteful number, since it uses less digits than its factorization.

106721699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8834.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 106721699 is about 10330.6194877171. The cubic root of 106721699 is about 474.3339866338. Note that the first 3 decimals are identical.

The spelling of 106721699 in words is "one hundred six million, seven hundred twenty-one thousand, six hundred ninety-nine".