2869721 has 2 divisors, whose sum is σ = 2869722. Its totient is φ = 2869720.

The previous prime is 2869693. The next prime is 2869729. The reversal of 2869721 is 1279682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 373321 = 1580^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2869721 - 2¹⁴ = 2853337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2869729) 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, 1434860 + 1434861.

It is an arithmetic number, because the mean of its divisors is an integer number (1434861).

2^2869721 is an apocalyptic number.

It is an amenable number.

2869721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2869721 is an equidigital number, since it uses as much as digits as its factorization.

2869721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 2869721 is about 1694.0250883620. The cubic root of 2869721 is about 142.1062650977.

The spelling of 2869721 in words is "two million, eight hundred sixty-nine thousand, seven hundred twenty-one".