628654249 has 2 divisors, whose sum is σ = 628654250. Its totient is φ = 628654248.

The previous prime is 628654231. The next prime is 628654297. The reversal of 628654249 is 942456826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404613225 + 224041024 = 20115^2 + 14968^2 .

It is a cyclic number.

It is not a de Polignac number, because 628654249 - 2¹⁹ = 628129961 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 628654199 and 628654208.

It is not a weakly prime, because it can be changed into another prime (628655249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314327124 + 314327125.

It is an arithmetic number, because the mean of its divisors is an integer number (314327125).

Almost surely, 2^628654249 is an apocalyptic number.

It is an amenable number.

628654249 is a deficient number, since it is larger than the sum of its proper divisors (1).

628654249 is an equidigital number, since it uses as much as digits as its factorization.

628654249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 46.

The square root of 628654249 is about 25072.9784628791. The cubic root of 628654249 is about 856.6510504167.

The spelling of 628654249 in words is "six hundred twenty-eight million, six hundred fifty-four thousand, two hundred forty-nine".