720887 has 2 divisors, whose sum is σ = 720888. Its totient is φ = 720886.

The previous prime is 720877. The next prime is 720899. The reversal of 720887 is 788027.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (788027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720887 - 2¹⁶ = 655351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360443 + 360444.

It is an arithmetic number, because the mean of its divisors is an integer number (360444).

2⁷²⁰⁸⁸⁷ is an apocalyptic number.

720887 is a deficient number, since it is larger than the sum of its proper divisors (1).

720887 is an equidigital number, since it uses as much as digits as its factorization.

720887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 720887 is about 849.0506463103. The cubic root of 720887 is about 89.6648854385.

The spelling of 720887 in words is "seven hundred twenty thousand, eight hundred eighty-seven".