74474009 has 2 divisors, whose sum is σ = 74474010. Its totient is φ = 74474008.

The previous prime is 74474003. The next prime is 74474021. The reversal of 74474009 is 90047447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74011609 + 462400 = 8603^2 + 680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74474009 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74474009.

It is not a weakly prime, because it can be changed into another prime (74474003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37237004 + 37237005.

It is an arithmetic number, because the mean of its divisors is an integer number (37237005).

Almost surely, 2^74474009 is an apocalyptic number.

It is an amenable number.

74474009 is a deficient number, since it is larger than the sum of its proper divisors (1).

74474009 is an equidigital number, since it uses as much as digits as its factorization.

74474009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 74474009 is about 8629.8325012714. The cubic root of 74474009 is about 420.7281567394.

The spelling of 74474009 in words is "seventy-four million, four hundred seventy-four thousand, nine".