628689547 has 2 divisors, whose sum is σ = 628689548. Its totient is φ = 628689546.

The previous prime is 628689539. The next prime is 628689571. The reversal of 628689547 is 745986826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628689547 - 2³ = 628689539 is a prime.

It is not a weakly prime, because it can be changed into another prime (628689577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314344773 + 314344774.

It is an arithmetic number, because the mean of its divisors is an integer number (314344774).

Almost surely, 2^628689547 is an apocalyptic number.

628689547 is a deficient number, since it is larger than the sum of its proper divisors (1).

628689547 is an equidigital number, since it uses as much as digits as its factorization.

628689547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The square root of 628689547 is about 25073.6823582018. The cubic root of 628689547 is about 856.6670833436.

The spelling of 628689547 in words is "six hundred twenty-eight million, six hundred eighty-nine thousand, five hundred forty-seven".