69939 has 12 divisors (see below), whose sum is σ = 106600. Its totient is φ = 44064.

The previous prime is 69931. The next prime is 69941. The reversal of 69939 is 93996.

It is not a de Polignac number, because 69939 - 2³ = 69931 is a prime.

It is a Duffinian number.

69939 is a lucky number.

It is a plaindrome in base 13 and base 16.

It is a zygodrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 69939.

It is not an unprimeable number, because it can be changed into a prime (69931) 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 11 ways as a sum of consecutive naturals, for example, 34 + ... + 375.

2⁶⁹⁹³⁹ is an apocalyptic number.

69939 is a deficient number, since it is larger than the sum of its proper divisors (36661).

69939 is a wasteful number, since it uses less digits than its factorization.

69939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 431 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 69939 is about 264.4598268169. The cubic root of 69939 is about 41.2008781665.

It can be divided in two parts, 699 and 39, that multiplied together give a triangular number (27261 = T₂₃₃).

The spelling of 69939 in words is "sixty-nine thousand, nine hundred thirty-nine".