74748209 has 2 divisors, whose sum is σ = 74748210. Its totient is φ = 74748208.

The previous prime is 74748197. The next prime is 74748211. The reversal of 74748209 is 90284747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 529984 = 8615^2 + 728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74748209 is a prime.

Together with 74748211, 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 (74748259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37374104 + 37374105.

It is an arithmetic number, because the mean of its divisors is an integer number (37374105).

Almost surely, 2^74748209 is an apocalyptic number.

It is an amenable number.

74748209 is a deficient number, since it is larger than the sum of its proper divisors (1).

74748209 is an equidigital number, since it uses as much as digits as its factorization.

74748209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 74748209 is about 8645.7046560706. The cubic root of 74748209 is about 421.2438729748.

The spelling of 74748209 in words is "seventy-four million, seven hundred forty-eight thousand, two hundred nine".