1027898869 has 2 divisors, whose sum is σ = 1027898870. Its totient is φ = 1027898868.

The previous prime is 1027898849. The next prime is 1027898923. The reversal of 1027898869 is 9688987201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782600625 + 245298244 = 27975^2 + 15662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1027898869 is a prime.

It is a super-2 number, since 2×1027898869² = 2113152169782958322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1027898849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513949434 + 513949435.

It is an arithmetic number, because the mean of its divisors is an integer number (513949435).

Almost surely, 2^1027898869 is an apocalyptic number.

It is an amenable number.

1027898869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1027898869 is an equidigital number, since it uses as much as digits as its factorization.

1027898869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 58.

The square root of 1027898869 is about 32060.8619503594. The cubic root of 1027898869 is about 1009.2144560123.

The spelling of 1027898869 in words is "one billion, twenty-seven million, eight hundred ninety-eight thousand, eight hundred sixty-nine".