2721193 has 2 divisors, whose sum is σ = 2721194. Its totient is φ = 2721192.

The previous prime is 2721167. The next prime is 2721197. The reversal of 2721193 is 3911272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2301289 + 419904 = 1517^2 + 648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2721193 is a prime.

2721193 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2721197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360596 + 1360597.

It is an arithmetic number, because the mean of its divisors is an integer number (1360597).

2^2721193 is an apocalyptic number.

It is an amenable number.

2721193 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721193 is an equidigital number, since it uses as much as digits as its factorization.

2721193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 2721193 is about 1649.6038918480. The cubic root of 2721193 is about 139.6110462438.

The spelling of 2721193 in words is "two million, seven hundred twenty-one thousand, one hundred ninety-three".