7872239 has 2 divisors, whose sum is σ = 7872240. Its totient is φ = 7872238.

The previous prime is 7872223. The next prime is 7872269. The reversal of 7872239 is 9322787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7872239 - 2⁴ = 7872223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7872269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936119 + 3936120.

It is an arithmetic number, because the mean of its divisors is an integer number (3936120).

Almost surely, 2^7872239 is an apocalyptic number.

7872239 is a deficient number, since it is larger than the sum of its proper divisors (1).

7872239 is an equidigital number, since it uses as much as digits as its factorization.

7872239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 7872239 is about 2805.7510580948. The cubic root of 7872239 is about 198.9296065088.

The spelling of 7872239 in words is "seven million, eight hundred seventy-two thousand, two hundred thirty-nine".