74717442209 has 2 divisors, whose sum is σ = 74717442210. Its totient is φ = 74717442208.

The previous prime is 74717442157. The next prime is 74717442223. The reversal of 74717442209 is 90224471747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71100622609 + 3616819600 = 266647^2 + 60140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74717442209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (74717442269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37358721104 + 37358721105.

It is an arithmetic number, because the mean of its divisors is an integer number (37358721105).

Almost surely, 2^74717442209 is an apocalyptic number.

It is an amenable number.

74717442209 is a deficient number, since it is larger than the sum of its proper divisors (1).

74717442209 is an equidigital number, since it uses as much as digits as its factorization.

74717442209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 74717442209 in words is "seventy-four billion, seven hundred seventeen million, four hundred forty-two thousand, two hundred nine".