109661439 has 8 divisors (see below), whose sum is σ = 147858480. Its totient is φ = 72286016.

The previous prime is 109661423. The next prime is 109661443. The reversal of 109661439 is 934166901.

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 109661439 - 2⁴ = 109661423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109661397 and 109661406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109661039) 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, 205092 + ... + 205625.

It is an arithmetic number, because the mean of its divisors is an integer number (18482310).

Almost surely, 2^109661439 is an apocalyptic number.

109661439 is a deficient number, since it is larger than the sum of its proper divisors (38197041).

109661439 is an equidigital number, since it uses as much as digits as its factorization.

109661439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410809.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 109661439 is about 10471.9357809337. The cubic root of 109661439 is about 478.6499084271.

The spelling of 109661439 in words is "one hundred nine million, six hundred sixty-one thousand, four hundred thirty-nine".