628769287 has 2 divisors, whose sum is σ = 628769288. Its totient is φ = 628769286.

The previous prime is 628769269. The next prime is 628769291. The reversal of 628769287 is 782967826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628769287 - 2¹¹ = 628767239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628769237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314384643 + 314384644.

It is an arithmetic number, because the mean of its divisors is an integer number (314384644).

Almost surely, 2^628769287 is an apocalyptic number.

628769287 is a deficient number, since it is larger than the sum of its proper divisors (1).

628769287 is an equidigital number, since it uses as much as digits as its factorization.

628769287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 55.

The square root of 628769287 is about 25075.2724212520. The cubic root of 628769287 is about 856.7033003423.

The spelling of 628769287 in words is "six hundred twenty-eight million, seven hundred sixty-nine thousand, two hundred eighty-seven".