628970101 has 2 divisors, whose sum is σ = 628970102. Its totient is φ = 628970100.

The previous prime is 628970093. The next prime is 628970119. The reversal of 628970101 is 101079826.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512977201 + 115992900 = 22649^2 + 10770^2 .

It is a cyclic number.

It is not a de Polignac number, because 628970101 - 2³ = 628970093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628970201) 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, 314485050 + 314485051.

It is an arithmetic number, because the mean of its divisors is an integer number (314485051).

Almost surely, 2^628970101 is an apocalyptic number.

It is an amenable number.

628970101 is a deficient number, since it is larger than the sum of its proper divisors (1).

628970101 is an equidigital number, since it uses as much as digits as its factorization.

628970101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 628970101 is about 25079.2763252850. The cubic root of 628970101 is about 856.7944942075.

The spelling of 628970101 in words is "six hundred twenty-eight million, nine hundred seventy thousand, one hundred one".