109027661 has 4 divisors (see below), whose sum is σ = 111563232. Its totient is φ = 106492092.

The previous prime is 109027657. The next prime is 109027669. The reversal of 109027661 is 166720901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 109027661 - 2² = 109027657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109027669) 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, 1267721 + ... + 1267806.

It is an arithmetic number, because the mean of its divisors is an integer number (27890808).

Almost surely, 2^109027661 is an apocalyptic number.

It is an amenable number.

109027661 is a deficient number, since it is larger than the sum of its proper divisors (2535571).

109027661 is an equidigital number, since it uses as much as digits as its factorization.

109027661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535570.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 109027661 is about 10441.6311465211. The cubic root of 109027661 is about 477.7260222146.

The spelling of 109027661 in words is "one hundred nine million, twenty-seven thousand, six hundred sixty-one".