73239 has 4 divisors (see below), whose sum is σ = 97656. Its totient is φ = 48824.

The previous prime is 73237. The next prime is 73243. The reversal of 73239 is 93237.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93237 = 3 ⋅31079.

It is a cyclic number.

It is not a de Polignac number, because 73239 - 2¹ = 73237 is a prime.

It is a super-2 number, since 2×73239² = 10727902242, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12204 + ... + 12209.

It is an arithmetic number, because the mean of its divisors is an integer number (24414).

2⁷³²³⁹ is an apocalyptic number.

73239 is a deficient number, since it is larger than the sum of its proper divisors (24417).

73239 is a wasteful number, since it uses less digits than its factorization.

73239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24416.

The product of its digits is 1134, while the sum is 24.

The square root of 73239 is about 270.6270496458. The cubic root of 73239 is about 41.8389524188.

The spelling of 73239 in words is "seventy-three thousand, two hundred thirty-nine".