39775669 has 2 divisors, whose sum is σ = 39775670. Its totient is φ = 39775668.

The previous prime is 39775667. The next prime is 39775709. The reversal of 39775669 is 96657793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 2137444 = 6135^2 + 1462^2 .

It is an emirp because it is prime and its reverse (96657793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39775669 - 2¹ = 39775667 is a prime.

It is a super-2 number, since 2×39775669² = 3164207688795122, which contains 22 as substring.

Together with 39775667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39775667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19887834 + 19887835.

It is an arithmetic number, because the mean of its divisors is an integer number (19887835).

Almost surely, 2^39775669 is an apocalyptic number.

It is an amenable number.

39775669 is a deficient number, since it is larger than the sum of its proper divisors (1).

39775669 is an equidigital number, since it uses as much as digits as its factorization.

39775669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 52.

The square root of 39775669 is about 6306.7954620393. The cubic root of 39775669 is about 341.3546560530.

The spelling of 39775669 in words is "thirty-nine million, seven hundred seventy-five thousand, six hundred sixty-nine".