3208243981 has 2 divisors, whose sum is σ = 3208243982. Its totient is φ = 3208243980.

The previous prime is 3208243963. The next prime is 3208244009. The reversal of 3208243981 is 1893428023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3193267081 + 14976900 = 56509^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 3208243981 - 2⁵ = 3208243949 is a prime.

It is a super-2 number, since 2×3208243981² = 20585658883245456722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3208243921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1604121990 + 1604121991.

It is an arithmetic number, because the mean of its divisors is an integer number (1604121991).

Almost surely, 2^3208243981 is an apocalyptic number.

It is an amenable number.

3208243981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3208243981 is an equidigital number, since it uses as much as digits as its factorization.

3208243981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 3208243981 is about 56641.3628102291. The cubic root of 3208243981 is about 1474.8769761992.

The spelling of 3208243981 in words is "three billion, two hundred eight million, two hundred forty-three thousand, nine hundred eighty-one".