39793639 has 2 divisors, whose sum is σ = 39793640. Its totient is φ = 39793638.

The previous prime is 39793627. The next prime is 39793661. The reversal of 39793639 is 93639793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39793639 - 2¹⁵ = 39760871 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 39793592 and 39793601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39793609) 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, 19896819 + 19896820.

It is an arithmetic number, because the mean of its divisors is an integer number (19896820).

Almost surely, 2^39793639 is an apocalyptic number.

39793639 is a deficient number, since it is larger than the sum of its proper divisors (1).

39793639 is an equidigital number, since it uses as much as digits as its factorization.

39793639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 826686, while the sum is 49.

The square root of 39793639 is about 6308.2199549477. The cubic root of 39793639 is about 341.4060544731.

The spelling of 39793639 in words is "thirty-nine million, seven hundred ninety-three thousand, six hundred thirty-nine".