4638973813 has 2 divisors, whose sum is σ = 4638973814. Its totient is φ = 4638973812.

The previous prime is 4638973793. The next prime is 4638973819. The reversal of 4638973813 is 3183798364.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3732843409 + 906130404 = 61097^2 + 30102^2 .

It is a cyclic number.

It is not a de Polignac number, because 4638973813 - 2¹³ = 4638965621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4638973819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2319486906 + 2319486907.

It is an arithmetic number, because the mean of its divisors is an integer number (2319486907).

Almost surely, 2^4638973813 is an apocalyptic number.

It is an amenable number.

4638973813 is a deficient number, since it is larger than the sum of its proper divisors (1).

4638973813 is an equidigital number, since it uses as much as digits as its factorization.

4638973813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 52.

The square root of 4638973813 is about 68110.0125752448. The cubic root of 4638973813 is about 1667.7872151250.

The spelling of 4638973813 in words is "four billion, six hundred thirty-eight million, nine hundred seventy-three thousand, eight hundred thirteen".