628907533 has 2 divisors, whose sum is σ = 628907534. Its totient is φ = 628907532.

The previous prime is 628907519. The next prime is 628907549. The reversal of 628907533 is 335709826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318372649 + 310534884 = 17843^2 + 17622^2 .

It is a cyclic number.

It is not a de Polignac number, because 628907533 - 2⁵ = 628907501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 628907533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628907933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314453766 + 314453767.

It is an arithmetic number, because the mean of its divisors is an integer number (314453767).

Almost surely, 2^628907533 is an apocalyptic number.

It is an amenable number.

628907533 is a deficient number, since it is larger than the sum of its proper divisors (1).

628907533 is an equidigital number, since it uses as much as digits as its factorization.

628907533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 628907533 is about 25078.0288898470. The cubic root of 628907533 is about 856.7660828434.

The spelling of 628907533 in words is "six hundred twenty-eight million, nine hundred seven thousand, five hundred thirty-three".