106109491 has 4 divisors (see below), whose sum is σ = 106200072. Its totient is φ = 106018912.

The previous prime is 106109473. The next prime is 106109537. The reversal of 106109491 is 194901601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194901601 = 19 ⋅10257979.

It is a cyclic number.

It is not a de Polignac number, because 106109491 - 2¹⁵ = 106076723 is a prime.

It is a super-2 number, since 2×106109491² = 22518448160558162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106109431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43510 + ... + 45883.

It is an arithmetic number, because the mean of its divisors is an integer number (26550018).

Almost surely, 2^106109491 is an apocalyptic number.

106109491 is a deficient number, since it is larger than the sum of its proper divisors (90581).

106109491 is an equidigital number, since it uses as much as digits as its factorization.

106109491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90580.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 106109491 is about 10300.9461215949. The cubic root of 106109491 is about 473.4252426276.

The spelling of 106109491 in words is "one hundred six million, one hundred nine thousand, four hundred ninety-one".