74739 has 8 divisors (see below), whose sum is σ = 113920. Its totient is φ = 42696.

The previous prime is 74731. The next prime is 74747. The reversal of 74739 is 93747.

It is an interprime number because it is at equal distance from previous prime (74731) and next prime (74747).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74739 - 2³ = 74731 is a prime.

It is a super-3 number, since 3×74739³ = 1252457803336257, which contains 333 as substring.

It is a Duffinian number.

74739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (74731) 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, 1759 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (14240).

2⁷⁴⁷³⁹ is an apocalyptic number.

74739 is a deficient number, since it is larger than the sum of its proper divisors (39181).

74739 is a wasteful number, since it uses less digits than its factorization.

74739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569.

The product of its digits is 5292, while the sum is 30.

The square root of 74739 is about 273.3843448334. The cubic root of 74739 is about 42.1226573144.

The spelling of 74739 in words is "seventy-four thousand, seven hundred thirty-nine".