4638379391 has 4 divisors (see below), whose sum is σ = 4647904272. Its totient is φ = 4628854512.

The previous prime is 4638379379. The next prime is 4638379411. The reversal of 4638379391 is 1939738364.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4638379391 - 2¹⁸ = 4638117247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4638379301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4761710 + ... + 4762683.

It is an arithmetic number, because the mean of its divisors is an integer number (1161976068).

Almost surely, 2^4638379391 is an apocalyptic number.

4638379391 is a deficient number, since it is larger than the sum of its proper divisors (9524881).

4638379391 is an equidigital number, since it uses as much as digits as its factorization.

4638379391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9524880.

The product of its digits is 2939328, while the sum is 53.

The square root of 4638379391 is about 68105.6487451665. The cubic root of 4638379391 is about 1667.7159772608.

The spelling of 4638379391 in words is "four billion, six hundred thirty-eight million, three hundred seventy-nine thousand, three hundred ninety-one".