39871387 has 2 divisors, whose sum is σ = 39871388. Its totient is φ = 39871386.

The previous prime is 39871373. The next prime is 39871427. The reversal of 39871387 is 78317893.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39871387 - 2¹¹ = 39869339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39871187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19935693 + 19935694.

It is an arithmetic number, because the mean of its divisors is an integer number (19935694).

Almost surely, 2^39871387 is an apocalyptic number.

39871387 is a deficient number, since it is larger than the sum of its proper divisors (1).

39871387 is an equidigital number, since it uses as much as digits as its factorization.

39871387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 39871387 is about 6314.3793835974. The cubic root of 39871387 is about 341.6282538876.

The spelling of 39871387 in words is "thirty-nine million, eight hundred seventy-one thousand, three hundred eighty-seven".