74644109 has 2 divisors, whose sum is σ = 74644110. Its totient is φ = 74644108.

The previous prime is 74644099. The next prime is 74644111. The reversal of 74644109 is 90144647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55547209 + 19096900 = 7453^2 + 4370^2 .

It is an emirp because it is prime and its reverse (90144647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74644109 - 2⁸ = 74643853 is a prime.

Together with 74644111, 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 (74644139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37322054 + 37322055.

It is an arithmetic number, because the mean of its divisors is an integer number (37322055).

Almost surely, 2^74644109 is an apocalyptic number.

It is an amenable number.

74644109 is a deficient number, since it is larger than the sum of its proper divisors (1).

74644109 is an equidigital number, since it uses as much as digits as its factorization.

74644109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 74644109 is about 8639.6822279526. The cubic root of 74644109 is about 421.0482301160.

The spelling of 74644109 in words is "seventy-four million, six hundred forty-four thousand, one hundred nine".