3218657989 has 2 divisors, whose sum is σ = 3218657990. Its totient is φ = 3218657988.

The previous prime is 3218657983. The next prime is 3218658017. The reversal of 3218657989 is 9897568123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2974829764 + 243828225 = 54542^2 + 15615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3218657989 is a prime.

It is a super-5 number, since 5×3218657989⁵ (a number of 49 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3218657983) 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, 1609328994 + 1609328995.

It is an arithmetic number, because the mean of its divisors is an integer number (1609328995).

Almost surely, 2^3218657989 is an apocalyptic number.

It is an amenable number.

3218657989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3218657989 is an equidigital number, since it uses as much as digits as its factorization.

3218657989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 58.

The square root of 3218657989 is about 56733.2176859378. The cubic root of 3218657989 is about 1476.4710768659.

The spelling of 3218657989 in words is "three billion, two hundred eighteen million, six hundred fifty-seven thousand, nine hundred eighty-nine".