2721947 has 2 divisors, whose sum is σ = 2721948. Its totient is φ = 2721946.

The previous prime is 2721913. The next prime is 2722001. The reversal of 2721947 is 7491272.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2721947 is a prime.

It is not a weakly prime, because it can be changed into another prime (2721247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360973 + 1360974.

It is an arithmetic number, because the mean of its divisors is an integer number (1360974).

2^2721947 is an apocalyptic number.

2721947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721947 is an equidigital number, since it uses as much as digits as its factorization.

2721947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 2721947 is about 1649.8324157320. The cubic root of 2721947 is about 139.6239397317.

The spelling of 2721947 in words is "two million, seven hundred twenty-one thousand, nine hundred forty-seven".