628887349 has 2 divisors, whose sum is σ = 628887350. Its totient is φ = 628887348.

The previous prime is 628887293. The next prime is 628887361. The reversal of 628887349 is 943788826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620906724 + 7980625 = 24918^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 628887349 - 2⁷ = 628887221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 628887349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628887379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314443674 + 314443675.

It is an arithmetic number, because the mean of its divisors is an integer number (314443675).

Almost surely, 2^628887349 is an apocalyptic number.

It is an amenable number.

628887349 is a deficient number, since it is larger than the sum of its proper divisors (1).

628887349 is an equidigital number, since it uses as much as digits as its factorization.

628887349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The square root of 628887349 is about 25077.6264626459. The cubic root of 628887349 is about 856.7569171337.

The spelling of 628887349 in words is "six hundred twenty-eight million, eight hundred eighty-seven thousand, three hundred forty-nine".