39806479 has 2 divisors, whose sum is σ = 39806480. Its totient is φ = 39806478.

The previous prime is 39806477. The next prime is 39806489. The reversal of 39806479 is 97460893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39806479 - 2¹ = 39806477 is a prime.

Together with 39806477, 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 (39806471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19903239 + 19903240.

It is an arithmetic number, because the mean of its divisors is an integer number (19903240).

Almost surely, 2^39806479 is an apocalyptic number.

39806479 is a deficient number, since it is larger than the sum of its proper divisors (1).

39806479 is an equidigital number, since it uses as much as digits as its factorization.

39806479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 39806479 is about 6309.2375926097. The cubic root of 39806479 is about 341.4427704111.

The spelling of 39806479 in words is "thirty-nine million, eight hundred six thousand, four hundred seventy-nine".