109896561 has 8 divisors (see below), whose sum is σ = 162809760. Its totient is φ = 73264356.

The previous prime is 109896559. The next prime is 109896583. The reversal of 109896561 is 165698901.

109896561 is a `hidden beast` number, since 1 + 0 + 9 + 89 + 6 + 561 = 666.

It is not a de Polignac number, because 109896561 - 2¹ = 109896559 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (109896511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2035095 + ... + 2035148.

It is an arithmetic number, because the mean of its divisors is an integer number (20351220).

Almost surely, 2^109896561 is an apocalyptic number.

It is an amenable number.

109896561 is a deficient number, since it is larger than the sum of its proper divisors (52913199).

109896561 is an equidigital number, since it uses as much as digits as its factorization.

109896561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070252 (or 4070246 counting only the distinct ones).

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

The square root of 109896561 is about 10483.1560610343. The cubic root of 109896561 is about 478.9917508237.

The spelling of 109896561 in words is "one hundred nine million, eight hundred ninety-six thousand, five hundred sixty-one".