39945263 has 2 divisors, whose sum is σ = 39945264. Its totient is φ = 39945262.

The previous prime is 39945259. The next prime is 39945271. The reversal of 39945263 is 36254993.

It is a weak prime.

It is an emirp because it is prime and its reverse (36254993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39945263 - 2² = 39945259 is a prime.

It is a super-2 number, since 2×39945263² = 3191248072278338, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39945263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39945203) 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 as a sum of consecutive naturals, namely, 19972631 + 19972632.

It is an arithmetic number, because the mean of its divisors is an integer number (19972632).

Almost surely, 2^39945263 is an apocalyptic number.

39945263 is a deficient number, since it is larger than the sum of its proper divisors (1).

39945263 is an equidigital number, since it uses as much as digits as its factorization.

39945263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 41.

The square root of 39945263 is about 6320.2264991059. The cubic root of 39945263 is about 341.8391198682.

The spelling of 39945263 in words is "thirty-nine million, nine hundred forty-five thousand, two hundred sixty-three".