2720387 has 2 divisors, whose sum is σ = 2720388. Its totient is φ = 2720386.

The previous prime is 2720383. The next prime is 2720411. The reversal of 2720387 is 7830272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2720387 - 2² = 2720383 is a prime.

It is not a weakly prime, because it can be changed into another prime (2720381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360193 + 1360194.

It is an arithmetic number, because the mean of its divisors is an integer number (1360194).

2^2720387 is an apocalyptic number.

2720387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2720387 is an equidigital number, since it uses as much as digits as its factorization.

2720387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 2720387 is about 1649.3595726827. The cubic root of 2720387 is about 139.5972609157.

The spelling of 2720387 in words is "two million, seven hundred twenty thousand, three hundred eighty-seven".