109656143 has 2 divisors, whose sum is σ = 109656144. Its totient is φ = 109656142.

The previous prime is 109656139. The next prime is 109656167. The reversal of 109656143 is 341656901.

It is a weak prime.

It is an emirp because it is prime and its reverse (341656901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109656143 - 2² = 109656139 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109656133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54828071 + 54828072.

It is an arithmetic number, because the mean of its divisors is an integer number (54828072).

Almost surely, 2^109656143 is an apocalyptic number.

109656143 is a deficient number, since it is larger than the sum of its proper divisors (1).

109656143 is an equidigital number, since it uses as much as digits as its factorization.

109656143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 109656143 is about 10471.6829115477. The cubic root of 109656143 is about 478.6422029816.

The spelling of 109656143 in words is "one hundred nine million, six hundred fifty-six thousand, one hundred forty-three".