39669573 has 4 divisors (see below), whose sum is σ = 52892768. Its totient is φ = 26446380.

The previous prime is 39669571. The next prime is 39669577. The reversal of 39669573 is 37596693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39669573 - 2¹ = 39669571 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39669571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6611593 + ... + 6611598.

It is an arithmetic number, because the mean of its divisors is an integer number (13223192).

Almost surely, 2^39669573 is an apocalyptic number.

It is an amenable number.

39669573 is a deficient number, since it is larger than the sum of its proper divisors (13223195).

39669573 is a wasteful number, since it uses less digits than its factorization.

39669573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13223194.

The product of its digits is 918540, while the sum is 48.

The square root of 39669573 is about 6298.3786008782. The cubic root of 39669573 is about 341.0508806296.

The spelling of 39669573 in words is "thirty-nine million, six hundred sixty-nine thousand, five hundred seventy-three".