39669893 has 4 divisors (see below), whose sum is σ = 40021068. Its totient is φ = 39318720.

The previous prime is 39669827. The next prime is 39669913. The reversal of 39669893 is 39896693.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16176484 + 23493409 = 4022^2 + 4847^2 .

It is a cyclic number.

It is not a de Polignac number, because 39669893 - 2¹⁰ = 39668869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39669803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175418 + ... + 175643.

It is an arithmetic number, because the mean of its divisors is an integer number (10005267).

Almost surely, 2^39669893 is an apocalyptic number.

It is an amenable number.

39669893 is a deficient number, since it is larger than the sum of its proper divisors (351175).

39669893 is a wasteful number, since it uses less digits than its factorization.

39669893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351174.

The product of its digits is 1889568, while the sum is 53.

The square root of 39669893 is about 6298.4040041903. The cubic root of 39669893 is about 341.0517976716.

The spelling of 39669893 in words is "thirty-nine million, six hundred sixty-nine thousand, eight hundred ninety-three".