39604661 has 2 divisors, whose sum is σ = 39604662. Its totient is φ = 39604660.

The previous prime is 39604637. The next prime is 39604667. The reversal of 39604661 is 16640693.

39604661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25959025 + 13645636 = 5095^2 + 3694^2 .

It is a cyclic number.

It is not a de Polignac number, because 39604661 - 2¹⁰ = 39603637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39604667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19802330 + 19802331.

It is an arithmetic number, because the mean of its divisors is an integer number (19802331).

Almost surely, 2^39604661 is an apocalyptic number.

It is an amenable number.

39604661 is a deficient number, since it is larger than the sum of its proper divisors (1).

39604661 is an equidigital number, since it uses as much as digits as its factorization.

39604661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 39604661 is about 6293.2234188848. The cubic root of 39604661 is about 340.8647566126.

The spelling of 39604661 in words is "thirty-nine million, six hundred four thousand, six hundred sixty-one".