49945 has 8 divisors (see below), whose sum is σ = 68544. Its totient is φ = 34224.

The previous prime is 49943. The next prime is 49957. The reversal of 49945 is 54994.

It is a happy number.

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 49945 - 2¹ = 49943 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (49943) 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, 679 + ... + 748.

It is an arithmetic number, because the mean of its divisors is an integer number (8568).

2⁴⁹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

49945 is a deficient number, since it is larger than the sum of its proper divisors (18599).

49945 is a wasteful number, since it uses less digits than its factorization.

49945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439.

The product of its digits is 6480, while the sum is 31.

The square root of 49945 is about 223.4837801721. The cubic root of 49945 is about 36.8268019149.

The spelling of 49945 in words is "forty-nine thousand, nine hundred forty-five".