72399 has 4 divisors (see below), whose sum is σ = 96536. Its totient is φ = 48264.

The previous prime is 72383. The next prime is 72421. The reversal of 72399 is 99327.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72399 - 2⁴ = 72383 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72379) 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, 12064 + ... + 12069.

It is an arithmetic number, because the mean of its divisors is an integer number (24134).

2⁷²³⁹⁹ is an apocalyptic number.

72399 is a deficient number, since it is larger than the sum of its proper divisors (24137).

72399 is a wasteful number, since it uses less digits than its factorization.

72399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24136.

The product of its digits is 3402, while the sum is 30.

The square root of 72399 is about 269.0706226997. The cubic root of 72399 is about 41.6783824832.

The spelling of 72399 in words is "seventy-two thousand, three hundred ninety-nine".