109491638 has 8 divisors (see below), whose sum is σ = 171378288. Its totient is φ = 52365544.

The previous prime is 109491589. The next prime is 109491647. The reversal of 109491638 is 836194901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 109491595 and 109491604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190081 + ... + 1190172.

It is an arithmetic number, because the mean of its divisors is an integer number (21422286).

Almost surely, 2^109491638 is an apocalyptic number.

109491638 is a deficient number, since it is larger than the sum of its proper divisors (61886650).

109491638 is a wasteful number, since it uses less digits than its factorization.

109491638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380278.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 109491638 is about 10463.8252087848. The cubic root of 109491638 is about 478.4027318470.

The spelling of 109491638 in words is "one hundred nine million, four hundred ninety-one thousand, six hundred thirty-eight".