109158861 has 16 divisors (see below), whose sum is σ = 168344064. Its totient is φ = 61623984.

The previous prime is 109158859. The next prime is 109158877. The reversal of 109158861 is 168851901.

It is not a de Polignac number, because 109158861 - 2¹ = 109158859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109158821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29571 + ... + 33056.

It is an arithmetic number, because the mean of its divisors is an integer number (10521504).

Almost surely, 2^109158861 is an apocalyptic number.

It is an amenable number.

109158861 is a deficient number, since it is larger than the sum of its proper divisors (59185203).

109158861 is an equidigital number, since it uses as much as digits as its factorization.

109158861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62720.

The product of its (nonzero) digits is 17280, while the sum is 39.

The square root of 109158861 is about 10447.9118009294. The cubic root of 109158861 is about 477.9175715547.

The spelling of 109158861 in words is "one hundred nine million, one hundred fifty-eight thousand, eight hundred sixty-one".