39709223 has 4 divisors (see below), whose sum is σ = 39732360. Its totient is φ = 39686088.

The previous prime is 39709211. The next prime is 39709237. The reversal of 39709223 is 32290793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32290793 = 2939 ⋅10987.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39709223 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 (39709273) 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, 8768 + ... + 12501.

It is an arithmetic number, because the mean of its divisors is an integer number (9933090).

Almost surely, 2^39709223 is an apocalyptic number.

39709223 is a deficient number, since it is larger than the sum of its proper divisors (23137).

39709223 is a wasteful number, since it uses less digits than its factorization.

39709223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23136.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 39709223 is about 6301.5254502382. The cubic root of 39709223 is about 341.1644703288.

The spelling of 39709223 in words is "thirty-nine million, seven hundred nine thousand, two hundred twenty-three".