106389409 has 4 divisors (see below), whose sum is σ = 121587904. Its totient is φ = 91190916.

The previous prime is 106389403. The next prime is 106389419. The reversal of 106389409 is 904983601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 106389409 - 2³ = 106389401 is a prime.

It is a super-2 number, since 2×106389409² = 22637412694738562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106389401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7599237 + ... + 7599250.

It is an arithmetic number, because the mean of its divisors is an integer number (30396976).

Almost surely, 2^106389409 is an apocalyptic number.

It is an amenable number.

106389409 is a deficient number, since it is larger than the sum of its proper divisors (15198495).

106389409 is an equidigital number, since it uses as much as digits as its factorization.

106389409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15198494.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 106389409 is about 10314.5241771009. The cubic root of 106389409 is about 473.8411774208.

The spelling of 106389409 in words is "one hundred six million, three hundred eighty-nine thousand, four hundred nine".