106561279 has 4 divisors (see below), whose sum is σ = 116248680. Its totient is φ = 96873880.

The previous prime is 106561249. The next prime is 106561307. The reversal of 106561279 is 972165601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 106561279 - 2¹¹ = 106559231 is a prime.

It is a super-2 number, since 2×106561279² = 22710612364231682, 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 (106561249) 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, 4843684 + ... + 4843705.

It is an arithmetic number, because the mean of its divisors is an integer number (29062170).

Almost surely, 2^106561279 is an apocalyptic number.

106561279 is a deficient number, since it is larger than the sum of its proper divisors (9687401).

106561279 is an equidigital number, since it uses as much as digits as its factorization.

106561279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9687400.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 106561279 is about 10322.8522705694. The cubic root of 106561279 is about 474.0962005127.

It can be divided in two parts, 10656 and 1279, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 106561279 in words is "one hundred six million, five hundred sixty-one thousand, two hundred seventy-nine".