720500057 has 4 divisors (see below), whose sum is σ = 720950016. Its totient is φ = 720050100.

The previous prime is 720500051. The next prime is 720500059. The reversal of 720500057 is 750005027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750005027 = 8837 ⋅84871.

It is a cyclic number.

It is not a de Polignac number, because 720500057 - 2¹⁰ = 720499033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720499999 and 720500035.

It is not an unprimeable number, because it can be changed into a prime (720500051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222569 + ... + 225782.

It is an arithmetic number, because the mean of its divisors is an integer number (180237504).

Almost surely, 2^720500057 is an apocalyptic number.

It is an amenable number.

720500057 is a deficient number, since it is larger than the sum of its proper divisors (449959).

720500057 is a wasteful number, since it uses less digits than its factorization.

720500057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449958.

The product of its (nonzero) digits is 2450, while the sum is 26.

The square root of 720500057 is about 26842.1321247028. The cubic root of 720500057 is about 896.4883973868.

The spelling of 720500057 in words is "seven hundred twenty million, five hundred thousand, fifty-seven".