628143899 has 2 divisors, whose sum is σ = 628143900. Its totient is φ = 628143898.

The previous prime is 628143853. The next prime is 628143949. The reversal of 628143899 is 998341826.

It is a happy number.

It is an a-pointer prime, because the next prime (628143949) can be obtained adding 628143899 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628143899 - 2²⁸ = 359708443 is a prime.

It is not a weakly prime, because it can be changed into another prime (628143839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314071949 + 314071950.

It is an arithmetic number, because the mean of its divisors is an integer number (314071950).

Almost surely, 2^628143899 is an apocalyptic number.

628143899 is a deficient number, since it is larger than the sum of its proper divisors (1).

628143899 is an equidigital number, since it uses as much as digits as its factorization.

628143899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The square root of 628143899 is about 25062.7991054471. The cubic root of 628143899 is about 856.4191740323.

The spelling of 628143899 in words is "six hundred twenty-eight million, one hundred forty-three thousand, eight hundred ninety-nine".