109792561 has 2 divisors, whose sum is σ = 109792562. Its totient is φ = 109792560.

The previous prime is 109792559. The next prime is 109792567. The reversal of 109792561 is 165297901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102394161 + 7398400 = 10119^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 109792561 - 2¹ = 109792559 is a prime.

Together with 109792559, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109792567) 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, 54896280 + 54896281.

It is an arithmetic number, because the mean of its divisors is an integer number (54896281).

Almost surely, 2^109792561 is an apocalyptic number.

It is an amenable number.

109792561 is a deficient number, since it is larger than the sum of its proper divisors (1).

109792561 is an equidigital number, since it uses as much as digits as its factorization.

109792561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 109792561 is about 10478.1945486806. The cubic root of 109792561 is about 478.8406060745.

The spelling of 109792561 in words is "one hundred nine million, seven hundred ninety-two thousand, five hundred sixty-one".