39679 has 2 divisors, whose sum is σ = 39680. Its totient is φ = 39678.

The previous prime is 39671. The next prime is 39703. The reversal of 39679 is 97693.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39679 - 2³ = 39671 is a prime.

It is a plaindrome in base 16.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19839 + 19840.

It is an arithmetic number, because the mean of its divisors is an integer number (19840).

2³⁹⁶⁷⁹ is an apocalyptic number.

39679 is a deficient number, since it is larger than the sum of its proper divisors (1).

39679 is an equidigital number, since it uses as much as digits as its factorization.

39679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 34.

The square root of 39679 is about 199.1958834916. The cubic root of 39679 is about 34.1077894045.

The spelling of 39679 in words is "thirty-nine thousand, six hundred seventy-nine".