2893721 has 2 divisors, whose sum is σ = 2893722. Its totient is φ = 2893720.

The previous prime is 2893717. The next prime is 2893727. The reversal of 2893721 is 1273982.

2893721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2890000 + 3721 = 1700^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 2893721 - 2² = 2893717 is a prime.

It is not a weakly prime, because it can be changed into another prime (2893727) 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, 1446860 + 1446861.

It is an arithmetic number, because the mean of its divisors is an integer number (1446861).

2^2893721 is an apocalyptic number.

It is an amenable number.

2893721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2893721 is an equidigital number, since it uses as much as digits as its factorization.

2893721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 2893721 is about 1701.0940597157. The cubic root of 2893721 is about 142.5013193681.

It can be divided in two parts, 289 and 3721, that multiplied together give a square (1075369 = 1037²).

The spelling of 2893721 in words is "two million, eight hundred ninety-three thousand, seven hundred twenty-one".