106721873 has 4 divisors (see below), whose sum is σ = 106895460. Its totient is φ = 106548288.

The previous prime is 106721831. The next prime is 106721891. The reversal of 106721873 is 378127601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378127601 = 4483 ⋅84347.

It can be written as a sum of positive squares in 2 ways, for example, as 2334784 + 104387089 = 1528^2 + 10217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106721873 is a prime.

It is a super-2 number, since 2×106721873² = 22779116353256258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106721273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85868 + ... + 87101.

It is an arithmetic number, because the mean of its divisors is an integer number (26723865).

Almost surely, 2^106721873 is an apocalyptic number.

It is an amenable number.

106721873 is a deficient number, since it is larger than the sum of its proper divisors (173587).

106721873 is an equidigital number, since it uses as much as digits as its factorization.

106721873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173586.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 106721873 is about 10330.6279092802. The cubic root of 106721873 is about 474.3342444198.

The spelling of 106721873 in words is "one hundred six million, seven hundred twenty-one thousand, eight hundred seventy-three".