2921213 has 2 divisors, whose sum is σ = 2921214. Its totient is φ = 2921212.

The previous prime is 2921203. The next prime is 2921221. The reversal of 2921213 is 3121292.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1582564 + 1338649 = 1258^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 2921213 - 2⁴ = 2921197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2921203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460606 + 1460607.

It is an arithmetic number, because the mean of its divisors is an integer number (1460607).

2^2921213 is an apocalyptic number.

It is an amenable number.

2921213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921213 is an equidigital number, since it uses as much as digits as its factorization.

2921213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 2921213 is about 1709.1556394899. The cubic root of 2921213 is about 142.9511789916.

It can be divided in two parts, 29212 and 13, that multiplied together give a triangular number (379756 = T₈₇₁).

The spelling of 2921213 in words is "two million, nine hundred twenty-one thousand, two hundred thirteen".