39872387 has 2 divisors, whose sum is σ = 39872388. Its totient is φ = 39872386.

The previous prime is 39872353. The next prime is 39872401. The reversal of 39872387 is 78327893.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39872387 - 2¹² = 39868291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39872687) 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, 19936193 + 19936194.

It is an arithmetic number, because the mean of its divisors is an integer number (19936194).

Almost surely, 2^39872387 is an apocalyptic number.

39872387 is a deficient number, since it is larger than the sum of its proper divisors (1).

39872387 is an equidigital number, since it uses as much as digits as its factorization.

39872387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 39872387 is about 6314.4585674466. The cubic root of 39872387 is about 341.6311099491.

The spelling of 39872387 in words is "thirty-nine million, eight hundred seventy-two thousand, three hundred eighty-seven".