39764009 has 4 divisors (see below), whose sum is σ = 40415940. Its totient is φ = 39112080.

The previous prime is 39763931. The next prime is 39764051. The reversal of 39764009 is 90046793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90046793 = 5009 ⋅17977.

It can be written as a sum of positive squares in 2 ways, for example, as 20430400 + 19333609 = 4520^2 + 4397^2 .

It is a cyclic number.

It is not a de Polignac number, because 39764009 - 2⁸ = 39763753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39764059) 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, 325874 + ... + 325995.

It is an arithmetic number, because the mean of its divisors is an integer number (10103985).

Almost surely, 2^39764009 is an apocalyptic number.

It is an amenable number.

39764009 is a deficient number, since it is larger than the sum of its proper divisors (651931).

39764009 is an equidigital number, since it uses as much as digits as its factorization.

39764009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651930.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 39764009 is about 6305.8709945574. The cubic root of 39764009 is about 341.3212974331.

The spelling of 39764009 in words is "thirty-nine million, seven hundred sixty-four thousand, nine".