106989561 has 12 divisors (see below), whose sum is σ = 176617792. Its totient is φ = 61136856.

The previous prime is 106989557. The next prime is 106989581. The reversal of 106989561 is 165989601.

106989561 is a `hidden beast` number, since 1 + 0 + 6 + 9 + 89 + 561 = 666.

It is not a de Polignac number, because 106989561 - 2² = 106989557 is a prime.

It is a super-2 number, since 2×106989561² = 22893532325945442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106989511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 849061 + ... + 849186.

Almost surely, 2^106989561 is an apocalyptic number.

It is an amenable number.

106989561 is a deficient number, since it is larger than the sum of its proper divisors (69628231).

106989561 is a wasteful number, since it uses less digits than its factorization.

106989561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698260 (or 1698257 counting only the distinct ones).

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

The square root of 106989561 is about 10343.5758323705. The cubic root of 106989561 is about 474.7305004940.

The spelling of 106989561 in words is "one hundred six million, nine hundred eighty-nine thousand, five hundred sixty-one".