628199101 has 2 divisors, whose sum is σ = 628199102. Its totient is φ = 628199100.

The previous prime is 628199087. The next prime is 628199107. The reversal of 628199101 is 101991826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332187076 + 296012025 = 18226^2 + 17205^2 .

It is a cyclic number.

It is not a de Polignac number, because 628199101 - 2¹³ = 628190909 is a prime.

It is a super-2 number, since 2×628199101² = 789268220994416402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628199107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314099550 + 314099551.

It is an arithmetic number, because the mean of its divisors is an integer number (314099551).

Almost surely, 2^628199101 is an apocalyptic number.

It is an amenable number.

628199101 is a deficient number, since it is larger than the sum of its proper divisors (1).

628199101 is an equidigital number, since it uses as much as digits as its factorization.

628199101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 628199101 is about 25063.9003548929. The cubic root of 628199101 is about 856.4442609943. Note that the first 3 decimals are identical.

The spelling of 628199101 in words is "six hundred twenty-eight million, one hundred ninety-nine thousand, one hundred one".