106569891 has 16 divisors (see below), whose sum is σ = 159129600. Its totient is φ = 70484904.

The previous prime is 106569857. The next prime is 106569899. The reversal of 106569891 is 198965601.

106569891 is a `hidden beast` number, since 1 + 0 + 6 + 569 + 89 + 1 = 666.

It is not a de Polignac number, because 106569891 - 2⁷ = 106569763 is a prime.

It is a super-2 number, since 2×106569891² = 22714283335503762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106569899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12111 + ... + 18968.

It is an arithmetic number, because the mean of its divisors is an integer number (9945600).

Almost surely, 2^106569891 is an apocalyptic number.

106569891 is a deficient number, since it is larger than the sum of its proper divisors (52559709).

106569891 is a wasteful number, since it uses less digits than its factorization.

106569891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31215 (or 31209 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 106569891 is about 10323.2693949155. The cubic root of 106569891 is about 474.1089719012.

The spelling of 106569891 in words is "one hundred six million, five hundred sixty-nine thousand, eight hundred ninety-one".