109937561 has 2 divisors, whose sum is σ = 109937562. Its totient is φ = 109937560.

The previous prime is 109937549. The next prime is 109937609. The reversal of 109937561 is 165739901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66113161 + 43824400 = 8131^2 + 6620^2 .

It is a cyclic number.

It is not a de Polignac number, because 109937561 - 2¹⁰ = 109936537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109937461) 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, 54968780 + 54968781.

It is an arithmetic number, because the mean of its divisors is an integer number (54968781).

Almost surely, 2^109937561 is an apocalyptic number.

It is an amenable number.

109937561 is a deficient number, since it is larger than the sum of its proper divisors (1).

109937561 is an equidigital number, since it uses as much as digits as its factorization.

109937561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 109937561 is about 10485.1113966424. Note that the first 3 decimals coincide. The cubic root of 109937561 is about 479.0513105280.

The spelling of 109937561 in words is "one hundred nine million, nine hundred thirty-seven thousand, five hundred sixty-one".