109639649 has 8 divisors (see below), whose sum is σ = 127019520. Its totient is φ = 92689056.

The previous prime is 109639639. The next prime is 109639657. The reversal of 109639649 is 946936901.

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

It is a cyclic number.

It is not a de Polignac number, because 109639649 - 2⁸ = 109639393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109639639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106769 + ... + 107790.

It is an arithmetic number, because the mean of its divisors is an integer number (15877440).

Almost surely, 2^109639649 is an apocalyptic number.

It is an amenable number.

109639649 is a deficient number, since it is larger than the sum of its proper divisors (17379871).

109639649 is an equidigital number, since it uses as much as digits as its factorization.

109639649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214639.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 109639649 is about 10470.8953294358. The cubic root of 109639649 is about 478.6182033523.

The spelling of 109639649 in words is "one hundred nine million, six hundred thirty-nine thousand, six hundred forty-nine".