749500109 has 2 divisors, whose sum is σ = 749500110. Its totient is φ = 749500108.

The previous prime is 749500091. The next prime is 749500111. The reversal of 749500109 is 901005947.

Together with previous prime (749500091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538379209 + 211120900 = 23203^2 + 14530^2 .

It is a cyclic number.

It is not a de Polignac number, because 749500109 - 2²⁸ = 481064653 is a prime.

Together with 749500111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749502109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374750054 + 374750055.

It is an arithmetic number, because the mean of its divisors is an integer number (374750055).

Almost surely, 2^749500109 is an apocalyptic number.

It is an amenable number.

749500109 is a deficient number, since it is larger than the sum of its proper divisors (1).

749500109 is an equidigital number, since it uses as much as digits as its factorization.

749500109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 749500109 is about 27376.9996347299. Note that the first 3 decimals coincide. The cubic root of 749500109 is about 908.3583932784.

The spelling of 749500109 in words is "seven hundred forty-nine million, five hundred thousand, one hundred nine".