109607661 has 20 divisors (see below), whose sum is σ = 169020544. Its totient is φ = 70713000.

The previous prime is 109607651. The next prime is 109607669. The reversal of 109607661 is 166706901.

It is not a de Polignac number, because 109607661 - 2¹⁷ = 109476589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109607669) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19315 + ... + 24336.

Almost surely, 2^109607661 is an apocalyptic number.

It is an amenable number.

109607661 is a deficient number, since it is larger than the sum of its proper divisors (59412883).

109607661 is an equidigital number, since it uses as much as digits as its factorization.

109607661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43694 (or 43685 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 109607661 is about 10469.3677459530. The cubic root of 109607661 is about 478.5716522843.

The spelling of 109607661 in words is "one hundred nine million, six hundred seven thousand, six hundred sixty-one".