109991249 has 2 divisors, whose sum is σ = 109991250. Its totient is φ = 109991248.

The previous prime is 109991239. The next prime is 109991257. The reversal of 109991249 is 942199901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65529025 + 44462224 = 8095^2 + 6668^2 .

It is a cyclic number.

It is not a de Polignac number, because 109991249 - 2¹² = 109987153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109991239) 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, 54995624 + 54995625.

It is an arithmetic number, because the mean of its divisors is an integer number (54995625).

Almost surely, 2^109991249 is an apocalyptic number.

It is an amenable number.

109991249 is a deficient number, since it is larger than the sum of its proper divisors (1).

109991249 is an equidigital number, since it uses as much as digits as its factorization.

109991249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 109991249 is about 10487.6712858480. The cubic root of 109991249 is about 479.1292793950.

The spelling of 109991249 in words is "one hundred nine million, nine hundred ninety-one thousand, two hundred forty-nine".