106720389 has 16 divisors (see below), whose sum is σ = 160108800. Its totient is φ = 70244928.

The previous prime is 106720387. The next prime is 106720421. The reversal of 106720389 is 983027601.

It is not a de Polignac number, because 106720389 - 2¹ = 106720387 is a prime.

It is a super-2 number, since 2×106720389² = 22778482856622642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106720387) 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 15 ways as a sum of consecutive naturals, for example, 22884 + ... + 27149.

It is an arithmetic number, because the mean of its divisors is an integer number (10006800).

Almost surely, 2^106720389 is an apocalyptic number.

It is an amenable number.

106720389 is a deficient number, since it is larger than the sum of its proper divisors (53388411).

106720389 is an equidigital number, since it uses as much as digits as its factorization.

106720389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50121 (or 50115 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 106720389 is about 10330.5560837740. The cubic root of 106720389 is about 474.3320458224.

The spelling of 106720389 in words is "one hundred six million, seven hundred twenty thousand, three hundred eighty-nine".