109235661 has 32 divisors (see below), whose sum is σ = 156254208. Its totient is φ = 67763520.

The previous prime is 109235653. The next prime is 109235669. The reversal of 109235661 is 166532901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (109235653) and next prime (109235669).

It is not a de Polignac number, because 109235661 - 2³ = 109235653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109235669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292671 + ... + 293043.

It is an arithmetic number, because the mean of its divisors is an integer number (4882944).

Almost surely, 2^109235661 is an apocalyptic number.

It is an amenable number.

109235661 is a deficient number, since it is larger than the sum of its proper divisors (47018547).

109235661 is a wasteful number, since it uses less digits than its factorization.

109235661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 109235661 is about 10451.5865302833. The cubic root of 109235661 is about 478.0296267883.

The spelling of 109235661 in words is "one hundred nine million, two hundred thirty-five thousand, six hundred sixty-one".