109779547 has 2 divisors, whose sum is σ = 109779548. Its totient is φ = 109779546.

The previous prime is 109779521. The next prime is 109779599. The reversal of 109779547 is 745977901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109779547 - 2¹⁹ = 109255259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109779547.

It is not a weakly prime, because it can be changed into another prime (109779647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54889773 + 54889774.

It is an arithmetic number, because the mean of its divisors is an integer number (54889774).

Almost surely, 2^109779547 is an apocalyptic number.

109779547 is a deficient number, since it is larger than the sum of its proper divisors (1).

109779547 is an equidigital number, since it uses as much as digits as its factorization.

109779547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 555660, while the sum is 49.

The square root of 109779547 is about 10477.5735263466. The cubic root of 109779547 is about 478.8216859163.

The spelling of 109779547 in words is "one hundred nine million, seven hundred seventy-nine thousand, five hundred forty-seven".