106438389 has 4 divisors (see below), whose sum is σ = 141917856. Its totient is φ = 70958924.

The previous prime is 106438333. The next prime is 106438421. The reversal of 106438389 is 983834601.

It is a happy number.

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 106438389 - 2⁷ = 106438261 is a prime.

It is a super-2 number, since 2×106438389² = 22658261305830642, 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 106438389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106438289) 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, 17739729 + ... + 17739734.

It is an arithmetic number, because the mean of its divisors is an integer number (35479464).

Almost surely, 2^106438389 is an apocalyptic number.

It is an amenable number.

106438389 is a deficient number, since it is larger than the sum of its proper divisors (35479467).

106438389 is an equidigital number, since it uses as much as digits as its factorization.

106438389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35479466.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 106438389 is about 10316.8982257266. The cubic root of 106438389 is about 473.9138825906.

The spelling of 106438389 in words is "one hundred six million, four hundred thirty-eight thousand, three hundred eighty-nine".