38390987 has 2 divisors, whose sum is σ = 38390988. Its totient is φ = 38390986.

The previous prime is 38390977. The next prime is 38391007. The reversal of 38390987 is 78909383.

38390987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38390987 - 2⁶ = 38390923 is a prime.

It is not a weakly prime, because it can be changed into another prime (38390977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19195493 + 19195494.

It is an arithmetic number, because the mean of its divisors is an integer number (19195494).

Almost surely, 2^38390987 is an apocalyptic number.

38390987 is a deficient number, since it is larger than the sum of its proper divisors (1).

38390987 is an equidigital number, since it uses as much as digits as its factorization.

38390987 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 47.

The square root of 38390987 is about 6196.0460779436. The cubic root of 38390987 is about 337.3466687129.

The spelling of 38390987 in words is "thirty-eight million, three hundred ninety thousand, nine hundred eighty-seven".