4999436621 has 2 divisors, whose sum is σ = 4999436622. Its totient is φ = 4999436620.

The previous prime is 4999436599. The next prime is 4999436627. The reversal of 4999436621 is 1266349994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4707880996 + 291555625 = 68614^2 + 17075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4999436621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4999436627) 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 as a sum of consecutive naturals, namely, 2499718310 + 2499718311.

It is an arithmetic number, because the mean of its divisors is an integer number (2499718311).

Almost surely, 2^4999436621 is an apocalyptic number.

It is an amenable number.

4999436621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4999436621 is an equidigital number, since it uses as much as digits as its factorization.

4999436621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 53.

The square root of 4999436621 is about 70706.6943153193. The cubic root of 4999436621 is about 1709.9117199618.

The spelling of 4999436621 in words is "four billion, nine hundred ninety-nine million, four hundred thirty-six thousand, six hundred twenty-one".