4639387 has 2 divisors, whose sum is σ = 4639388. Its totient is φ = 4639386.

The previous prime is 4639381. The next prime is 4639423. The reversal of 4639387 is 7839364.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4639387 - 2³ = 4639379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4639381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2319693 + 2319694.

It is an arithmetic number, because the mean of its divisors is an integer number (2319694).

Almost surely, 2^4639387 is an apocalyptic number.

4639387 is a deficient number, since it is larger than the sum of its proper divisors (1).

4639387 is an equidigital number, since it uses as much as digits as its factorization.

4639387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 4639387 is about 2153.9236291011. The cubic root of 4639387 is about 166.7836729491.

The spelling of 4639387 in words is "four million, six hundred thirty-nine thousand, three hundred eighty-seven".