628659233 has 2 divisors, whose sum is σ = 628659234. Its totient is φ = 628659232.

The previous prime is 628659223. The next prime is 628659257. The reversal of 628659233 is 332956826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498539584 + 130119649 = 22328^2 + 11407^2 .

It is a cyclic number.

It is not a de Polignac number, because 628659233 - 2⁴ = 628659217 is a prime.

It is a super-2 number, since 2×628659233² = 790424862472296578, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (628659203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314329616 + 314329617.

It is an arithmetic number, because the mean of its divisors is an integer number (314329617).

Almost surely, 2^628659233 is an apocalyptic number.

It is an amenable number.

628659233 is a deficient number, since it is larger than the sum of its proper divisors (1).

628659233 is an equidigital number, since it uses as much as digits as its factorization.

628659233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 44.

The square root of 628659233 is about 25073.0778525493. The cubic root of 628659233 is about 856.6533142672.

The spelling of 628659233 in words is "six hundred twenty-eight million, six hundred fifty-nine thousand, two hundred thirty-three".