39694661 has 2 divisors, whose sum is σ = 39694662. Its totient is φ = 39694660.

The previous prime is 39694657. The next prime is 39694679. The reversal of 39694661 is 16649693.

39694661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36784225 + 2910436 = 6065^2 + 1706^2 .

It is a cyclic number.

It is not a de Polignac number, because 39694661 - 2² = 39694657 is a prime.

It is a super-2 number, since 2×39694661² = 3151332223809842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39694651) 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, 19847330 + 19847331.

It is an arithmetic number, because the mean of its divisors is an integer number (19847331).

Almost surely, 2^39694661 is an apocalyptic number.

It is an amenable number.

39694661 is a deficient number, since it is larger than the sum of its proper divisors (1).

39694661 is an equidigital number, since it uses as much as digits as its factorization.

39694661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 39694661 is about 6300.3699097751. The cubic root of 39694661 is about 341.1227617612.

The spelling of 39694661 in words is "thirty-nine million, six hundred ninety-four thousand, six hundred sixty-one".