628332137 has 2 divisors, whose sum is σ = 628332138. Its totient is φ = 628332136.

The previous prime is 628332059. The next prime is 628332139. The reversal of 628332137 is 731233826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593945641 + 34386496 = 24371^2 + 5864^2 .

It is a cyclic number.

It is not a de Polignac number, because 628332137 - 2²⁴ = 611554921 is a prime.

Together with 628332139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 628332097 and 628332106.

It is not a weakly prime, because it can be changed into another prime (628332139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314166068 + 314166069.

It is an arithmetic number, because the mean of its divisors is an integer number (314166069).

Almost surely, 2^628332137 is an apocalyptic number.

It is an amenable number.

628332137 is a deficient number, since it is larger than the sum of its proper divisors (1).

628332137 is an equidigital number, since it uses as much as digits as its factorization.

628332137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 628332137 is about 25066.5541509000. The cubic root of 628332137 is about 856.5047141619.

The spelling of 628332137 in words is "six hundred twenty-eight million, three hundred thirty-two thousand, one hundred thirty-seven".