628077641 has 2 divisors, whose sum is σ = 628077642. Its totient is φ = 628077640.

The previous prime is 628077589. The next prime is 628077643. The reversal of 628077641 is 146770826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590684416 + 37393225 = 24304^2 + 6115^2 .

It is a cyclic number.

It is not a de Polignac number, because 628077641 - 2¹⁴ = 628061257 is a prime.

Together with 628077643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628077643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314038820 + 314038821.

It is an arithmetic number, because the mean of its divisors is an integer number (314038821).

Almost surely, 2^628077641 is an apocalyptic number.

It is an amenable number.

628077641 is a deficient number, since it is larger than the sum of its proper divisors (1).

628077641 is an equidigital number, since it uses as much as digits as its factorization.

628077641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 628077641 is about 25061.4772310014. The cubic root of 628077641 is about 856.3890606474.

The spelling of 628077641 in words is "six hundred twenty-eight million, seventy-seven thousand, six hundred forty-one".