39630309 has 4 divisors (see below), whose sum is σ = 52840416. Its totient is φ = 26420204.

The previous prime is 39630289. The next prime is 39630317. The reversal of 39630309 is 90303693.

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 a cyclic number.

It is not a de Polignac number, because 39630309 - 2¹⁷ = 39499237 is a prime.

It is a super-2 number, since 2×39630309² = 3141122782870962, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39630309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39630319) 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, 6605049 + ... + 6605054.

It is an arithmetic number, because the mean of its divisors is an integer number (13210104).

Almost surely, 2^39630309 is an apocalyptic number.

It is an amenable number.

39630309 is a deficient number, since it is larger than the sum of its proper divisors (13210107).

39630309 is a wasteful number, since it uses less digits than its factorization.

39630309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13210106.

The product of its (nonzero) digits is 13122, while the sum is 33.

The square root of 39630309 is about 6295.2608365341. The cubic root of 39630309 is about 340.9383221351.

The spelling of 39630309 in words is "thirty-nine million, six hundred thirty thousand, three hundred nine".