106205691 has 4 divisors (see below), whose sum is σ = 141607592. Its totient is φ = 70803792.

The previous prime is 106205689. The next prime is 106205731. The reversal of 106205691 is 196502601.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 106205691 - 2¹ = 106205689 is a prime.

It is a super-2 number, since 2×106205691² = 22559297601574962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106205791) 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, 17700946 + ... + 17700951.

It is an arithmetic number, because the mean of its divisors is an integer number (35401898).

Almost surely, 2^106205691 is an apocalyptic number.

106205691 is a deficient number, since it is larger than the sum of its proper divisors (35401901).

106205691 is an equidigital number, since it uses as much as digits as its factorization.

106205691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35401900.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 106205691 is about 10305.6145377168. The cubic root of 106205691 is about 473.5682702099.

The spelling of 106205691 in words is "one hundred six million, two hundred five thousand, six hundred ninety-one".