4643621431 has 2 divisors, whose sum is σ = 4643621432. Its totient is φ = 4643621430.

The previous prime is 4643621429. The next prime is 4643621497. The reversal of 4643621431 is 1341263464.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4643621431 - 2¹ = 4643621429 is a prime.

It is a super-2 number, since 2×4643621431² = 43126439988884975522, which contains 22 as substring.

Together with 4643621429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4643621531) 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, 2321810715 + 2321810716.

It is an arithmetic number, because the mean of its divisors is an integer number (2321810716).

Almost surely, 2^4643621431 is an apocalyptic number.

4643621431 is a deficient number, since it is larger than the sum of its proper divisors (1).

4643621431 is an equidigital number, since it uses as much as digits as its factorization.

4643621431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 34.

The square root of 4643621431 is about 68144.1224978354. The cubic root of 4643621431 is about 1668.3439942082.

Adding to 4643621431 its reverse (1341263464), we get a palindrome (5984884895).

The spelling of 4643621431 in words is "four billion, six hundred forty-three million, six hundred twenty-one thousand, four hundred thirty-one".