628748671 has 2 divisors, whose sum is σ = 628748672. Its totient is φ = 628748670.

The previous prime is 628748669. The next prime is 628748693. The reversal of 628748671 is 176847826.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628748671 - 2¹ = 628748669 is a prime.

Together with 628748669, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628748641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314374335 + 314374336.

It is an arithmetic number, because the mean of its divisors is an integer number (314374336).

Almost surely, 2^628748671 is an apocalyptic number.

628748671 is a deficient number, since it is larger than the sum of its proper divisors (1).

628748671 is an equidigital number, since it uses as much as digits as its factorization.

628748671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 49.

The square root of 628748671 is about 25074.8613356086. The cubic root of 628748671 is about 856.6939370837.

The spelling of 628748671 in words is "six hundred twenty-eight million, seven hundred forty-eight thousand, six hundred seventy-one".