106989581 has 2 divisors, whose sum is σ = 106989582. Its totient is φ = 106989580.

The previous prime is 106989557. The next prime is 106989593. The reversal of 106989581 is 185989601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106791556 + 198025 = 10334^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 106989581 - 2¹⁸ = 106727437 is a prime.

It is a super-2 number, since 2×106989581² = 22893540885111122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106989511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53494790 + 53494791.

It is an arithmetic number, because the mean of its divisors is an integer number (53494791).

Almost surely, 2^106989581 is an apocalyptic number.

It is an amenable number.

106989581 is a deficient number, since it is larger than the sum of its proper divisors (1).

106989581 is an equidigital number, since it uses as much as digits as its factorization.

106989581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 106989581 is about 10343.5767991541. The cubic root of 106989581 is about 474.7305300751.

The spelling of 106989581 in words is "one hundred six million, nine hundred eighty-nine thousand, five hundred eighty-one".