106391509 has 8 divisors (see below), whose sum is σ = 121670528. Its totient is φ = 91132560.

The previous prime is 106391489. The next prime is 106391531. The reversal of 106391509 is 905193601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 106391509 - 2⁵ = 106391477 is a prime.

It is a super-2 number, since 2×106391509² = 22638306374594162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106391599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8944 + ... + 17110.

It is an arithmetic number, because the mean of its divisors is an integer number (15208816).

Almost surely, 2^106391509 is an apocalyptic number.

It is an amenable number.

106391509 is a deficient number, since it is larger than the sum of its proper divisors (15279019).

106391509 is an equidigital number, since it uses as much as digits as its factorization.

106391509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10035.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 106391509 is about 10314.6259747991. The cubic root of 106391509 is about 473.8442950868.

The spelling of 106391509 in words is "one hundred six million, three hundred ninety-one thousand, five hundred nine".