628630091 has 2 divisors, whose sum is σ = 628630092. Its totient is φ = 628630090.

The previous prime is 628630069. The next prime is 628630099. The reversal of 628630091 is 190036826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628630091 - 2²² = 624435787 is a prime.

It is not a weakly prime, because it can be changed into another prime (628630099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314315045 + 314315046.

It is an arithmetic number, because the mean of its divisors is an integer number (314315046).

Almost surely, 2^628630091 is an apocalyptic number.

628630091 is a deficient number, since it is larger than the sum of its proper divisors (1).

628630091 is an equidigital number, since it uses as much as digits as its factorization.

628630091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 628630091 is about 25072.4967045566. The cubic root of 628630091 is about 856.6400771135.

The spelling of 628630091 in words is "six hundred twenty-eight million, six hundred thirty thousand, ninety-one".