39949 has 8 divisors (see below), whose sum is σ = 49280. Its totient is φ = 31536.

The previous prime is 39937. The next prime is 39953. The reversal of 39949 is 94993.

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

It is a cyclic number.

It is not a de Polignac number, because 39949 - 2⁷ = 39821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39929) 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, 129 + ... + 310.

It is an arithmetic number, because the mean of its divisors is an integer number (6160).

2³⁹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

39949 is a deficient number, since it is larger than the sum of its proper divisors (9331).

39949 is a wasteful number, since it uses less digits than its factorization.

39949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459.

The product of its digits is 8748, while the sum is 34.

The square root of 39949 is about 199.8724593334. The cubic root of 39949 is about 34.1849779563.

The spelling of 39949 in words is "thirty-nine thousand, nine hundred forty-nine".