628267819 has 2 divisors, whose sum is σ = 628267820. Its totient is φ = 628267818.

The previous prime is 628267811. The next prime is 628267823. The reversal of 628267819 is 918762826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628267819 - 2³ = 628267811 is a prime.

It is a super-2 number, since 2×628267819² = 789440904782033522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628267811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314133909 + 314133910.

It is an arithmetic number, because the mean of its divisors is an integer number (314133910).

Almost surely, 2^628267819 is an apocalyptic number.

628267819 is a deficient number, since it is larger than the sum of its proper divisors (1).

628267819 is an equidigital number, since it uses as much as digits as its factorization.

628267819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 628267819 is about 25065.2711734783. The cubic root of 628267819 is about 856.4754883503.

The spelling of 628267819 in words is "six hundred twenty-eight million, two hundred sixty-seven thousand, eight hundred nineteen".