3209813 has 2 divisors, whose sum is σ = 3209814. Its totient is φ = 3209812.

The previous prime is 3209809. The next prime is 3209837. The reversal of 3209813 is 3189023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2829124 + 380689 = 1682^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 3209813 - 2² = 3209809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₂₃₀₈₈₅ and since 3209813 and 230885 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3209513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1604906 + 1604907.

It is an arithmetic number, because the mean of its divisors is an integer number (1604907).

Almost surely, 2^3209813 is an apocalyptic number.

It is an amenable number.

3209813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3209813 is an equidigital number, since it uses as much as digits as its factorization.

3209813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 3209813 is about 1791.5950993458. The cubic root of 3209813 is about 147.5117370723.

The spelling of 3209813 in words is "three million, two hundred nine thousand, eight hundred thirteen".