3189281 has 2 divisors, whose sum is σ = 3189282. Its totient is φ = 3189280.

The previous prime is 3189269. The next prime is 3189287. The reversal of 3189281 is 1829813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1934881 + 1254400 = 1391^2 + 1120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3189281 is a prime.

It is a super-2 number, since 2×3189281² = 20343026593922, which contains 22 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3189287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1594640 + 1594641.

It is an arithmetic number, because the mean of its divisors is an integer number (1594641).

Almost surely, 2^3189281 is an apocalyptic number.

It is an amenable number.

3189281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3189281 is an equidigital number, since it uses as much as digits as its factorization.

3189281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 3189281 is about 1785.8558172484. The cubic root of 3189281 is about 147.1965378291.

The spelling of 3189281 in words is "three million, one hundred eighty-nine thousand, two hundred eighty-one".