628022693 has 2 divisors, whose sum is σ = 628022694. Its totient is φ = 628022692.

The previous prime is 628022683. The next prime is 628022729. The reversal of 628022693 is 396220826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522488164 + 105534529 = 22858^2 + 10273^2 .

It is a cyclic number.

It is not a de Polignac number, because 628022693 - 2²² = 623828389 is a prime.

It is equal to p_32709746 and since 628022693 and 32709746 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628022683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314011346 + 314011347.

It is an arithmetic number, because the mean of its divisors is an integer number (314011347).

Almost surely, 2^628022693 is an apocalyptic number.

It is an amenable number.

628022693 is a deficient number, since it is larger than the sum of its proper divisors (1).

628022693 is an equidigital number, since it uses as much as digits as its factorization.

628022693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 628022693 is about 25060.3809428348. The cubic root of 628022693 is about 856.3640859015.

The spelling of 628022693 in words is "six hundred twenty-eight million, twenty-two thousand, six hundred ninety-three".