74709 has 8 divisors (see below), whose sum is σ = 110720. Its totient is φ = 49788.
The previous prime is 74707. The next prime is 74713. The reversal of 74709 is 90747.
It is not a de Polignac number, because 74709 - 21 = 74707 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2767 = 74709 / (7 + 4 + 7 + 0 + 9).
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (74707) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1357 + ... + 1410.
It is an arithmetic number, because the mean of its divisors is an integer number (13840).
274709 is an apocalyptic number.
It is an amenable number.
74709 is a deficient number, since it is larger than the sum of its proper divisors (36011).
74709 is a wasteful number, since it uses less digits than its factorization.
74709 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2776 (or 2770 counting only the distinct ones).
The product of its (nonzero) digits is 1764, while the sum is 27.
The square root of 74709 is about 273.3294715174. The cubic root of 74709 is about 42.1170205927.
The spelling of 74709 in words is "seventy-four thousand, seven hundred nine".
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