628831727 has 2 divisors, whose sum is σ = 628831728. Its totient is φ = 628831726.

The previous prime is 628831681. The next prime is 628831741. The reversal of 628831727 is 727138826.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628831727 - 2¹⁰ = 628830703 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628881727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314415863 + 314415864.

It is an arithmetic number, because the mean of its divisors is an integer number (314415864).

Almost surely, 2^628831727 is an apocalyptic number.

628831727 is a deficient number, since it is larger than the sum of its proper divisors (1).

628831727 is an equidigital number, since it uses as much as digits as its factorization.

628831727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 628831727 is about 25076.5174416226. The cubic root of 628831727 is about 856.7316577406.

The spelling of 628831727 in words is "six hundred twenty-eight million, eight hundred thirty-one thousand, seven hundred twenty-seven".