2821969 has 2 divisors, whose sum is σ = 2821970. Its totient is φ = 2821968.

The previous prime is 2821957. The next prime is 2821979. The reversal of 2821969 is 9691282.

2821969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 82944 = 1655^2 + 288^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2821969 is a prime.

It is a super-2 number, since 2×2821969² = 15927018073922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2821909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410984 + 1410985.

It is an arithmetic number, because the mean of its divisors is an integer number (1410985).

2^2821969 is an apocalyptic number.

It is an amenable number.

2821969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821969 is an equidigital number, since it uses as much as digits as its factorization.

2821969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 2821969 is about 1679.8717212930. The cubic root of 2821969 is about 141.3136387998.

The spelling of 2821969 in words is "two million, eight hundred twenty-one thousand, nine hundred sixty-nine".