628426633 has 2 divisors, whose sum is σ = 628426634. Its totient is φ = 628426632.

The previous prime is 628426627. The next prime is 628426657. The reversal of 628426633 is 336624826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520432969 + 107993664 = 22813^2 + 10392^2 .

It is a cyclic number.

It is not a de Polignac number, because 628426633 - 2¹⁷ = 628295561 is a prime.

It is not a weakly prime, because it can be changed into another prime (628426663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314213316 + 314213317.

It is an arithmetic number, because the mean of its divisors is an integer number (314213317).

Almost surely, 2^628426633 is an apocalyptic number.

It is an amenable number.

628426633 is a deficient number, since it is larger than the sum of its proper divisors (1).

628426633 is an equidigital number, since it uses as much as digits as its factorization.

628426633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 40.

The square root of 628426633 is about 25068.4389821145. The cubic root of 628426633 is about 856.5476491043.

The spelling of 628426633 in words is "six hundred twenty-eight million, four hundred twenty-six thousand, six hundred thirty-three".