39669 has 8 divisors (see below), whose sum is σ = 60480. Its totient is φ = 22656.

The previous prime is 39667. The next prime is 39671. The reversal of 39669 is 96693.

It is an interprime number because it is at equal distance from previous prime (39667) and next prime (39671).

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

It is not a de Polignac number, because 39669 - 2¹ = 39667 is a prime.

It is a super-2 number, since 2×39669² = 3147259122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924 + ... + 965.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2³⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

39669 is a deficient number, since it is larger than the sum of its proper divisors (20811).

39669 is a wasteful number, since it uses less digits than its factorization.

39669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899.

The product of its digits is 8748, while the sum is 33.

The square root of 39669 is about 199.1707809896. The cubic root of 39669 is about 34.1049238539.

It can be divided in two parts, 396 and 69, that added together give a triangular number (465 = T₃₀).

The spelling of 39669 in words is "thirty-nine thousand, six hundred sixty-nine".