39870863 has 2 divisors, whose sum is σ = 39870864. Its totient is φ = 39870862.

The previous prime is 39870827. The next prime is 39870869. The reversal of 39870863 is 36807893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39870863 - 2¹² = 39866767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39870869) 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, 19935431 + 19935432.

It is an arithmetic number, because the mean of its divisors is an integer number (19935432).

Almost surely, 2^39870863 is an apocalyptic number.

39870863 is a deficient number, since it is larger than the sum of its proper divisors (1).

39870863 is an equidigital number, since it uses as much as digits as its factorization.

39870863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 39870863 is about 6314.3378908639. The cubic root of 39870863 is about 341.6267572923.

The spelling of 39870863 in words is "thirty-nine million, eight hundred seventy thousand, eight hundred sixty-three".