39887387 has 2 divisors, whose sum is σ = 39887388. Its totient is φ = 39887386.

The previous prime is 39887377. The next prime is 39887401. The reversal of 39887387 is 78378893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39887387 - 2⁴ = 39887371 is a prime.

It is not a weakly prime, because it can be changed into another prime (39887377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19943693 + 19943694.

It is an arithmetic number, because the mean of its divisors is an integer number (19943694).

Almost surely, 2^39887387 is an apocalyptic number.

39887387 is a deficient number, since it is larger than the sum of its proper divisors (1).

39887387 is an equidigital number, since it uses as much as digits as its factorization.

39887387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 53.

The square root of 39887387 is about 6315.6462060505. The cubic root of 39887387 is about 341.6739451421.

The spelling of 39887387 in words is "thirty-nine million, eight hundred eighty-seven thousand, three hundred eighty-seven".