685029053 has 2 divisors, whose sum is σ = 685029054. Its totient is φ = 685029052.

The previous prime is 685028977. The next prime is 685029067. The reversal of 685029053 is 350920586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682411129 + 2617924 = 26123^2 + 1618^2 .

It is a cyclic number.

It is not a de Polignac number, because 685029053 - 2¹² = 685024957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685028998 and 685029016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685029073) 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, 342514526 + 342514527.

It is an arithmetic number, because the mean of its divisors is an integer number (342514527).

Almost surely, 2^685029053 is an apocalyptic number.

It is an amenable number.

685029053 is a deficient number, since it is larger than the sum of its proper divisors (1).

685029053 is an equidigital number, since it uses as much as digits as its factorization.

685029053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 685029053 is about 26173.0596797547. The cubic root of 685029053 is about 881.5284443930.

The spelling of 685029053 in words is "six hundred eighty-five million, twenty-nine thousand, fifty-three".