2673721 has 2 divisors, whose sum is σ = 2673722. Its totient is φ = 2673720.

The previous prime is 2673707. The next prime is 2673739. The reversal of 2673721 is 1273762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2595321 + 78400 = 1611^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2673721 - 2¹⁷ = 2542649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2673721.

It is not a weakly prime, because it can be changed into another prime (2673701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1336860 + 1336861.

It is an arithmetic number, because the mean of its divisors is an integer number (1336861).

2^2673721 is an apocalyptic number.

It is an amenable number.

2673721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2673721 is an equidigital number, since it uses as much as digits as its factorization.

2673721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 28.

The square root of 2673721 is about 1635.1516749219. The cubic root of 2673721 is about 138.7944272415.

The spelling of 2673721 in words is "two million, six hundred seventy-three thousand, seven hundred twenty-one".