106548991 has 4 divisors (see below), whose sum is σ = 106579312. Its totient is φ = 106518672.

The previous prime is 106548977. The next prime is 106548997. The reversal of 106548991 is 199845601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199845601 = 1723 ⋅115987.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106548991 is a prime.

It is a super-2 number, since 2×106548991² = 22705374966236162, 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 (106548997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9075 + ... + 17188.

It is an arithmetic number, because the mean of its divisors is an integer number (26644828).

Almost surely, 2^106548991 is an apocalyptic number.

106548991 is a deficient number, since it is larger than the sum of its proper divisors (30321).

106548991 is an equidigital number, since it uses as much as digits as its factorization.

106548991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30320.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 106548991 is about 10322.2570690717. The cubic root of 106548991 is about 474.0779765133.

The spelling of 106548991 in words is "one hundred six million, five hundred forty-eight thousand, nine hundred ninety-one".