109961559 has 12 divisors (see below), whose sum is σ = 168176736. Its totient is φ = 68995392.

The previous prime is 109961513. The next prime is 109961561. The reversal of 109961559 is 955169901.

It is a happy number.

109961559 is a `hidden beast` number, since 1 + 0 + 9 + 96 + 1 + 559 = 666.

It is not a de Polignac number, because 109961559 - 2²⁰ = 108912983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109961659) 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, 359199 + ... + 359504.

It is an arithmetic number, because the mean of its divisors is an integer number (14014728).

Almost surely, 2^109961559 is an apocalyptic number.

109961559 is a deficient number, since it is larger than the sum of its proper divisors (58215177).

109961559 is a wasteful number, since it uses less digits than its factorization.

109961559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718726 (or 718723 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 45.

The square root of 109961559 is about 10486.2557187969. The cubic root of 109961559 is about 479.0861649698.

The spelling of 109961559 in words is "one hundred nine million, nine hundred sixty-one thousand, five hundred fifty-nine".