109385661 has 16 divisors (see below), whose sum is σ = 181836288. Its totient is φ = 56823600.

The previous prime is 109385623. The next prime is 109385669. The reversal of 109385661 is 166583901.

It is not a de Polignac number, because 109385661 - 2⁶ = 109385597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109385669) 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, 236535 + ... + 236996.

It is an arithmetic number, because the mean of its divisors is an integer number (11364768).

Almost surely, 2^109385661 is an apocalyptic number.

109385661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

109385661 is a deficient number, since it is larger than the sum of its proper divisors (72450627).

109385661 is a wasteful number, since it uses less digits than its factorization.

109385661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473552.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 109385661 is about 10458.7600125445. The cubic root of 109385661 is about 478.2483332906.

The spelling of 109385661 in words is "one hundred nine million, three hundred eighty-five thousand, six hundred sixty-one".