628266473 has 2 divisors, whose sum is σ = 628266474. Its totient is φ = 628266472.

The previous prime is 628266439. The next prime is 628266481. The reversal of 628266473 is 374662826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485893849 + 142372624 = 22043^2 + 11932^2 .

It is a cyclic number.

It is not a de Polignac number, because 628266473 - 2¹⁸ = 628004329 is a prime.

It is a super-2 number, since 2×628266473² = 789437522191719458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628266073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314133236 + 314133237.

It is an arithmetic number, because the mean of its divisors is an integer number (314133237).

Almost surely, 2^628266473 is an apocalyptic number.

It is an amenable number.

628266473 is a deficient number, since it is larger than the sum of its proper divisors (1).

628266473 is an equidigital number, since it uses as much as digits as its factorization.

628266473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 44.

The square root of 628266473 is about 25065.2443235649. The cubic root of 628266473 is about 856.4748767126.

The spelling of 628266473 in words is "six hundred twenty-eight million, two hundred sixty-six thousand, four hundred seventy-three".