39953 has 2 divisors, whose sum is σ = 39954. Its totient is φ = 39952.

The previous prime is 39937. The next prime is 39971. The reversal of 39953 is 35993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37249 + 2704 = 193^2 + 52^2 .

It is an emirp because it is prime and its reverse (35993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39953 - 2⁴ = 39937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19976 + 19977.

It is an arithmetic number, because the mean of its divisors is an integer number (19977).

2³⁹⁹⁵³ is an apocalyptic number.

It is an amenable number.

39953 is a deficient number, since it is larger than the sum of its proper divisors (1).

39953 is an equidigital number, since it uses as much as digits as its factorization.

39953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3645, while the sum is 29.

The square root of 39953 is about 199.8824654641. The cubic root of 39953 is about 34.1861188722.

The spelling of 39953 in words is "thirty-nine thousand, nine hundred fifty-three".