2720239 has 2 divisors, whose sum is σ = 2720240. Its totient is φ = 2720238.

The previous prime is 2720197. The next prime is 2720243. The reversal of 2720239 is 9320272.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2720239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2720269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360119 + 1360120.

It is an arithmetic number, because the mean of its divisors is an integer number (1360120).

2^2720239 is an apocalyptic number.

2720239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2720239 is an equidigital number, since it uses as much as digits as its factorization.

2720239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 2720239 is about 1649.3147061734. The cubic root of 2720239 is about 139.5947293188.

The spelling of 2720239 in words is "two million, seven hundred twenty thousand, two hundred thirty-nine".