628426517 has 2 divisors, whose sum is σ = 628426518. Its totient is φ = 628426516.

The previous prime is 628426457. The next prime is 628426531. The reversal of 628426517 is 715624826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613107121 + 15319396 = 24761^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 628426517 - 2¹⁰ = 628425493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628426417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314213258 + 314213259.

It is an arithmetic number, because the mean of its divisors is an integer number (314213259).

Almost surely, 2^628426517 is an apocalyptic number.

It is an amenable number.

628426517 is a deficient number, since it is larger than the sum of its proper divisors (1).

628426517 is an equidigital number, since it uses as much as digits as its factorization.

628426517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 628426517 is about 25068.4366684482. The cubic root of 628426517 is about 856.5475964015.

The spelling of 628426517 in words is "six hundred twenty-eight million, four hundred twenty-six thousand, five hundred seventeen".