74917 has 4 divisors (see below), whose sum is σ = 78880. Its totient is φ = 70956.

The previous prime is 74903. The next prime is 74923. The reversal of 74917 is 71947.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74917 - 2¹¹ = 72869 is a prime.

It is a super-2 number, since 2×74917² = 11225113778, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1953 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (19720).

2⁷⁴⁹¹⁷ is an apocalyptic number.

It is an amenable number.

74917 is a deficient number, since it is larger than the sum of its proper divisors (3963).

74917 is a wasteful number, since it uses less digits than its factorization.

74917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3962.

The product of its digits is 1764, while the sum is 28.

The square root of 74917 is about 273.7097002300. The cubic root of 74917 is about 42.1560708759.

Subtracting from 74917 its product of digits (1764), we obtain a triangular number (73153 = T₃₈₂).

The spelling of 74917 in words is "seventy-four thousand, nine hundred seventeen".