39366991 has 2 divisors, whose sum is σ = 39366992. Its totient is φ = 39366990.

The previous prime is 39366953. The next prime is 39367033. The reversal of 39366991 is 19966393.

39366991 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 is an emirp because it is prime and its reverse (19966393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39366991 - 2⁹ = 39366479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39366911) 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, 19683495 + 19683496.

It is an arithmetic number, because the mean of its divisors is an integer number (19683496).

Almost surely, 2^39366991 is an apocalyptic number.

39366991 is a deficient number, since it is larger than the sum of its proper divisors (1).

39366991 is an equidigital number, since it uses as much as digits as its factorization.

39366991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 46.

The square root of 39366991 is about 6274.3119941552. The cubic root of 39366991 is about 340.1815380013.

The spelling of 39366991 in words is "thirty-nine million, three hundred sixty-six thousand, nine hundred ninety-one".