3280649 has 2 divisors, whose sum is σ = 3280650. Its totient is φ = 3280648.

The previous prime is 3280639. The next prime is 3280657. The reversal of 3280649 is 9460823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3087049 + 193600 = 1757^2 + 440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3280649 is a prime.

It is a super-2 number, since 2×3280649² = 21525315722402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3280639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640324 + 1640325.

It is an arithmetic number, because the mean of its divisors is an integer number (1640325).

Almost surely, 2^3280649 is an apocalyptic number.

It is an amenable number.

3280649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3280649 is an equidigital number, since it uses as much as digits as its factorization.

3280649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 3280649 is about 1811.2561939163. The cubic root of 3280649 is about 148.5889757646.

The spelling of 3280649 in words is "three million, two hundred eighty thousand, six hundred forty-nine".