628820341 has 2 divisors, whose sum is σ = 628820342. Its totient is φ = 628820340.

The previous prime is 628820281. The next prime is 628820389. The reversal of 628820341 is 143028826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374577316 + 254243025 = 19354^2 + 15945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628820341 is a prime.

It is equal to p_32749135 and since 628820341 and 32749135 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 628820297 and 628820306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628820641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314410170 + 314410171.

It is an arithmetic number, because the mean of its divisors is an integer number (314410171).

Almost surely, 2^628820341 is an apocalyptic number.

It is an amenable number.

628820341 is a deficient number, since it is larger than the sum of its proper divisors (1).

628820341 is an equidigital number, since it uses as much as digits as its factorization.

628820341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 628820341 is about 25076.2904154502. The cubic root of 628820341 is about 856.7264868790.

The spelling of 628820341 in words is "six hundred twenty-eight million, eight hundred twenty thousand, three hundred forty-one".