1628030897 has 2 divisors, whose sum is σ = 1628030898. Its totient is φ = 1628030896.

The previous prime is 1628030879. The next prime is 1628030909. The reversal of 1628030897 is 7980308261.

Together with previous prime (1628030879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1545747856 + 82283041 = 39316^2 + 9071^2 .

It is a cyclic number.

It is not a de Polignac number, because 1628030897 - 2¹⁴ = 1628014513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1628030297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814015448 + 814015449.

It is an arithmetic number, because the mean of its divisors is an integer number (814015449).

Almost surely, 2^1628030897 is an apocalyptic number.

It is an amenable number.

1628030897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628030897 is an equidigital number, since it uses as much as digits as its factorization.

1628030897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1628030897 is about 40348.8648787051. The cubic root of 1628030897 is about 1176.3978286846.

The spelling of 1628030897 in words is "one billion, six hundred twenty-eight million, thirty thousand, eight hundred ninety-seven".