72739 has 2 divisors, whose sum is σ = 72740. Its totient is φ = 72738.

The previous prime is 72733. The next prime is 72763. The reversal of 72739 is 93727.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72739 - 2⁵ = 72707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72733) 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 as a sum of consecutive naturals, namely, 36369 + 36370.

It is an arithmetic number, because the mean of its divisors is an integer number (36370).

2⁷²⁷³⁹ is an apocalyptic number.

72739 is a deficient number, since it is larger than the sum of its proper divisors (1).

72739 is an equidigital number, since it uses as much as digits as its factorization.

72739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 28.

The square root of 72739 is about 269.7016870544. The cubic root of 72739 is about 41.7435239217.

The spelling of 72739 in words is "seventy-two thousand, seven hundred thirty-nine".