628199087 has 2 divisors, whose sum is σ = 628199088. Its totient is φ = 628199086.

The previous prime is 628199081. The next prime is 628199101. The reversal of 628199087 is 780991826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628199087 - 2¹⁰ = 628198063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628199081) 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, 314099543 + 314099544.

It is an arithmetic number, because the mean of its divisors is an integer number (314099544).

Almost surely, 2^628199087 is an apocalyptic number.

628199087 is a deficient number, since it is larger than the sum of its proper divisors (1).

628199087 is an equidigital number, since it uses as much as digits as its factorization.

628199087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 628199087 is about 25063.9000756067. The cubic root of 628199087 is about 856.4442546321. Note that the first 3 decimals are identical.

The spelling of 628199087 in words is "six hundred twenty-eight million, one hundred ninety-nine thousand, eighty-seven".