74609 has 2 divisors, whose sum is σ = 74610. Its totient is φ = 74608.
The previous prime is 74597. The next prime is 74611. The reversal of 74609 is 90647.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 73984 + 625 = 272^2 + 25^2 .
It is an emirp because it is prime and its reverse (90647) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 74609 - 28 = 74353 is a prime.
Together with 74611, 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 (74699) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37304 + 37305.
It is an arithmetic number, because the mean of its divisors is an integer number (37305).
274609 is an apocalyptic number.
It is an amenable number.
74609 is a deficient number, since it is larger than the sum of its proper divisors (1).
74609 is an equidigital number, since it uses as much as digits as its factorization.
74609 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1512, while the sum is 26.
The square root of 74609 is about 273.1464808486. The cubic root of 74609 is about 42.0982206149.
The spelling of 74609 in words is "seventy-four thousand, six hundred nine".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.063 sec. • engine limits •