69945 has 8 divisors (see below), whose sum is σ = 111936. Its totient is φ = 37296.

The previous prime is 69941. The next prime is 69959. The reversal of 69945 is 54996.

It is a happy number.

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

It is not a de Polignac number, because 69945 - 2² = 69941 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 12 and base 16.

It is not an unprimeable number, because it can be changed into a prime (69941) 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, 2317 + ... + 2346.

It is an arithmetic number, because the mean of its divisors is an integer number (13992).

2⁶⁹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

69945 is a deficient number, since it is larger than the sum of its proper divisors (41991).

69945 is a wasteful number, since it uses less digits than its factorization.

69945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671.

The product of its digits is 9720, while the sum is 33.

The square root of 69945 is about 264.4711704515. The cubic root of 69945 is about 41.2020563274.

The spelling of 69945 in words is "sixty-nine thousand, nine hundred forty-five".