39901 has 2 divisors, whose sum is σ = 39902. Its totient is φ = 39900.

The previous prime is 39887. The next prime is 39929. The reversal of 39901 is 10993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24025 + 15876 = 155^2 + 126^2 .

It is an emirp because it is prime and its reverse (10993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39901 - 2⁵ = 39869 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19950 + 19951.

It is an arithmetic number, because the mean of its divisors is an integer number (19951).

2³⁹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

39901 is a deficient number, since it is larger than the sum of its proper divisors (1).

39901 is an equidigital number, since it uses as much as digits as its factorization.

39901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 39901 is about 199.7523466696. The cubic root of 39901 is about 34.1712810213.

The spelling of 39901 in words is "thirty-nine thousand, nine hundred one".