4218479989 has 2 divisors, whose sum is σ = 4218479990. Its totient is φ = 4218479988.

The previous prime is 4218479963. The next prime is 4218480017. The reversal of 4218479989 is 9899748124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4082571025 + 135908964 = 63895^2 + 11658^2 .

It is a cyclic number.

It is not a de Polignac number, because 4218479989 - 2⁵ = 4218479957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4218473989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109239994 + 2109239995.

It is an arithmetic number, because the mean of its divisors is an integer number (2109239995).

Almost surely, 2^4218479989 is an apocalyptic number.

It is an amenable number.

4218479989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218479989 is an equidigital number, since it uses as much as digits as its factorization.

4218479989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 61.

The square root of 4218479989 is about 64949.8267049266. The cubic root of 4218479989 is about 1615.7915444290.

The spelling of 4218479989 in words is "four billion, two hundred eighteen million, four hundred seventy-nine thousand, nine hundred eighty-nine".