4218744949 has 2 divisors, whose sum is σ = 4218744950. Its totient is φ = 4218744948.

The previous prime is 4218744941. The next prime is 4218744977. The reversal of 4218744949 is 9494478124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3916506724 + 302238225 = 62582^2 + 17385^2 .

It is a cyclic number.

It is not a de Polignac number, because 4218744949 - 2³ = 4218744941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4218744896 and 4218744905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4218744941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109372474 + 2109372475.

It is an arithmetic number, because the mean of its divisors is an integer number (2109372475).

Almost surely, 2^4218744949 is an apocalyptic number.

It is an amenable number.

4218744949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218744949 is an equidigital number, since it uses as much as digits as its factorization.

4218744949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2322432, while the sum is 52.

The square root of 4218744949 is about 64951.8664012051. The cubic root of 4218744949 is about 1615.8253726615.

The spelling of 4218744949 in words is "four billion, two hundred eighteen million, seven hundred forty-four thousand, nine hundred forty-nine".