40739 has 2 divisors, whose sum is σ = 40740. Its totient is φ = 40738.

The previous prime is 40709. The next prime is 40751. The reversal of 40739 is 93704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40739 - 2⁸ = 40483 is a prime.

It is a super-2 number, since 2×40739² = 3319332242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40709) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20369 + 20370.

It is an arithmetic number, because the mean of its divisors is an integer number (20370).

2⁴⁰⁷³⁹ is an apocalyptic number.

40739 is a deficient number, since it is larger than the sum of its proper divisors (1).

40739 is an equidigital number, since it uses as much as digits as its factorization.

40739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 40739 is about 201.8390447857. The cubic root of 40739 is about 34.4088471025.

The spelling of 40739 in words is "forty thousand, seven hundred thirty-nine".