106309 has 4 divisors (see below), whose sum is σ = 121504. Its totient is φ = 91116.

The previous prime is 106307. The next prime is 106319. The reversal of 106309 is 903601.

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 106309 - 2¹ = 106307 is a prime.

It is a super-2 number, since 2×106309² = 22603206962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106303) 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, 7587 + ... + 7600.

It is an arithmetic number, because the mean of its divisors is an integer number (30376).

2¹⁰⁶³⁰⁹ is an apocalyptic number.

It is an amenable number.

106309 is a deficient number, since it is larger than the sum of its proper divisors (15195).

106309 is an equidigital number, since it uses as much as digits as its factorization.

106309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15194.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 106309 is about 326.0506095685. The cubic root of 106309 is about 47.3721771117.

The spelling of 106309 in words is "one hundred six thousand, three hundred nine".