555680729 has 4 divisors (see below), whose sum is σ = 555770676. Its totient is φ = 555590784.

The previous prime is 555680681. The next prime is 555680737. The reversal of 555680729 is 927086555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128142400 + 427538329 = 11320^2 + 20677^2 .

It is a cyclic number.

It is not a de Polignac number, because 555680729 - 2⁸ = 555680473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555680789) 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, 34964 + ... + 48309.

It is an arithmetic number, because the mean of its divisors is an integer number (138942669).

Almost surely, 2^555680729 is an apocalyptic number.

It is an amenable number.

555680729 is a deficient number, since it is larger than the sum of its proper divisors (89947).

555680729 is an equidigital number, since it uses as much as digits as its factorization.

555680729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89946.

The product of its (nonzero) digits is 756000, while the sum is 47.

The square root of 555680729 is about 23572.8812197406. The cubic root of 555680729 is about 822.1324276591.

The spelling of 555680729 in words is "five hundred fifty-five million, six hundred eighty thousand, seven hundred twenty-nine".