106591091 has 4 divisors (see below), whose sum is σ = 106877232. Its totient is φ = 106304952.

The previous prime is 106591087. The next prime is 106591127. The reversal of 106591091 is 190195601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190195601 = 29 ⋅6558469.

It is a cyclic number.

It is not a de Polignac number, because 106591091 - 2² = 106591087 is a prime.

It is a super-2 number, since 2×106591091² = 22723321361140562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106591291) 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, 142511 + ... + 143256.

It is an arithmetic number, because the mean of its divisors is an integer number (26719308).

Almost surely, 2^106591091 is an apocalyptic number.

106591091 is a deficient number, since it is larger than the sum of its proper divisors (286141).

106591091 is an equidigital number, since it uses as much as digits as its factorization.

106591091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286140.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 106591091 is about 10324.2961503436. The cubic root of 106591091 is about 474.1404080592.

The spelling of 106591091 in words is "one hundred six million, five hundred ninety-one thousand, ninety-one".