720877 has 2 divisors, whose sum is σ = 720878. Its totient is φ = 720876.

The previous prime is 720869. The next prime is 720887. The reversal of 720877 is 778027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 599076 + 121801 = 774^2 + 349^2 .

It is an emirp because it is prime and its reverse (778027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720877 - 2³ = 720869 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 polite number, since it can be written as a sum of consecutive naturals, namely, 360438 + 360439.

It is an arithmetic number, because the mean of its divisors is an integer number (360439).

2⁷²⁰⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

720877 is a deficient number, since it is larger than the sum of its proper divisors (1).

720877 is an equidigital number, since it uses as much as digits as its factorization.

720877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 720877 is about 849.0447573597. The cubic root of 720877 is about 89.6644708322.

The spelling of 720877 in words is "seven hundred twenty thousand, eight hundred seventy-seven".