4638391799 has 4 divisors (see below), whose sum is σ = 4657638480. Its totient is φ = 4619145120.

The previous prime is 4638391763. The next prime is 4638391847. The reversal of 4638391799 is 9971938364.

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 4638391799 - 2¹² = 4638387703 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 (4638391999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9622979 + ... + 9623460.

It is an arithmetic number, because the mean of its divisors is an integer number (1164409620).

Almost surely, 2^4638391799 is an apocalyptic number.

4638391799 is a deficient number, since it is larger than the sum of its proper divisors (19246681).

4638391799 is a wasteful number, since it uses less digits than its factorization.

4638391799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19246680.

The product of its digits is 8817984, while the sum is 59.

The square root of 4638391799 is about 68105.7398388711. The cubic root of 4638391799 is about 1667.7174643464.

The spelling of 4638391799 in words is "four billion, six hundred thirty-eight million, three hundred ninety-one thousand, seven hundred ninety-nine".