39955 has 8 divisors (see below), whose sum is σ = 49104. Its totient is φ = 31200.

The previous prime is 39953. The next prime is 39971. The reversal of 39955 is 55993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39955 - 2¹ = 39953 is a prime.

It is a Duffinian number.

39955 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (39953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240 + ... + 370.

It is an arithmetic number, because the mean of its divisors is an integer number (6138).

2³⁹⁹⁵⁵ is an apocalyptic number.

39955 is a deficient number, since it is larger than the sum of its proper divisors (9149).

39955 is a wasteful number, since it uses less digits than its factorization.

39955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197.

The product of its digits is 6075, while the sum is 31.

The square root of 39955 is about 199.8874683416. The cubic root of 39955 is about 34.1866893016.

It can be divided in two parts, 399 and 55, that multiplied together give a triangular number (21945 = T₂₀₉).

The spelling of 39955 in words is "thirty-nine thousand, nine hundred fifty-five".