628085813 has 2 divisors, whose sum is σ = 628085814. Its totient is φ = 628085812.

The previous prime is 628085807. The next prime is 628085833. The reversal of 628085813 is 318580826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 518108644 + 109977169 = 22762^2 + 10487^2 .

It is a cyclic number.

It is not a de Polignac number, because 628085813 - 2²² = 623891509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628085803) 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, 314042906 + 314042907.

It is an arithmetic number, because the mean of its divisors is an integer number (314042907).

Almost surely, 2^628085813 is an apocalyptic number.

It is an amenable number.

628085813 is a deficient number, since it is larger than the sum of its proper divisors (1).

628085813 is an equidigital number, since it uses as much as digits as its factorization.

628085813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 628085813 is about 25061.6402695434. The cubic root of 628085813 is about 856.3927748278.

The spelling of 628085813 in words is "six hundred twenty-eight million, eighty-five thousand, eight hundred thirteen".