106049991 has 4 divisors (see below), whose sum is σ = 141399992. Its totient is φ = 70699992.

The previous prime is 106049981. The next prime is 106050011. The reversal of 106049991 is 199940601.

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

It is not a de Polignac number, because 106049991 - 2⁵ = 106049959 is a prime.

It is a super-2 number, since 2×106049991² = 22493201182200162, 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 (106049971) 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, 17674996 + ... + 17675001.

It is an arithmetic number, because the mean of its divisors is an integer number (35349998).

Almost surely, 2^106049991 is an apocalyptic number.

106049991 is a deficient number, since it is larger than the sum of its proper divisors (35350001).

106049991 is an equidigital number, since it uses as much as digits as its factorization.

106049991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35350000.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 106049991 is about 10298.0576323887. The cubic root of 106049991 is about 473.3367363484.

The spelling of 106049991 in words is "one hundred six million, forty-nine thousand, nine hundred ninety-one".