3929 has 2 divisors, whose sum is σ = 3930.
Its totient is φ = 3928.
The previous prime is 3923. The next prime is 3931. The reversal of 3929 is 9293.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 2704 + 1225 = 52^2 + 35^2
It is an emirp because it is prime and its reverse (9293) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 3929 - 28 = 3673 is a prime.
Together with 3931, it forms a pair of twin primes.
It is a Chen prime.
It is a plaindrome in base 12 and base 15.
It is a nialpdrome in base 8.
It is not a weakly prime, because it can be changed into another prime (3923) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964 + 1965.
It is an arithmetic number, because the mean of its divisors is an integer number (1965).
23929 is an apocalyptic number.
It is an amenable number.
3929 is a deficient number, since it is larger than the sum of its proper divisors (1).
3929 is an equidigital number, since it uses as much as digits as its factorization.
3929 is an evil number, because the sum of its binary digits is even.
The product of its digits is 486, while the sum is 23.
The square root of 3929 is about 62.6817357769.
The cubic root of 3929 is about 15.7795280446.
Subtracting from 3929 its product of digits (486), we obtain a palindrome (3443).
The spelling of 3929 in words is "three thousand, nine hundred twenty-nine".