74671609 has 2 divisors, whose sum is σ = 74671610. Its totient is φ = 74671608.

The previous prime is 74671589. The next prime is 74671621. The reversal of 74671609 is 90617647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50808384 + 23863225 = 7128^2 + 4885^2 .

It is an emirp because it is prime and its reverse (90617647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74671609 - 2⁹ = 74671097 is a prime.

It is not a weakly prime, because it can be changed into another prime (74671679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37335804 + 37335805.

It is an arithmetic number, because the mean of its divisors is an integer number (37335805).

Almost surely, 2^74671609 is an apocalyptic number.

It is an amenable number.

74671609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74671609 is an equidigital number, since it uses as much as digits as its factorization.

74671609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 74671609 is about 8641.2735751161. The cubic root of 74671609 is about 421.0999305776.

The spelling of 74671609 in words is "seventy-four million, six hundred seventy-one thousand, six hundred nine".