106842209 has 4 divisors (see below), whose sum is σ = 107879616. Its totient is φ = 105804804.

The previous prime is 106842191. The next prime is 106842217. The reversal of 106842209 is 902248601.

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, and also an emirpimes, since its reverse is a distinct semiprime: 902248601 = 631 ⋅1429871.

It is a cyclic number.

It is not a de Polignac number, because 106842209 - 2⁸ = 106841953 is a prime.

It is a super-2 number, since 2×106842209² = 22830515247999362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106842259) 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, 518549 + ... + 518754.

It is an arithmetic number, because the mean of its divisors is an integer number (26969904).

Almost surely, 2^106842209 is an apocalyptic number.

It is an amenable number.

106842209 is a deficient number, since it is larger than the sum of its proper divisors (1037407).

106842209 is a wasteful number, since it uses less digits than its factorization.

106842209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037406.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 106842209 is about 10336.4505029531. The cubic root of 106842209 is about 474.5124585753.

The spelling of 106842209 in words is "one hundred six million, eight hundred forty-two thousand, two hundred nine".