1427987177689 has 2 divisors, whose sum is σ = 1427987177690. Its totient is φ = 1427987177688.

The previous prime is 1427987177671. The next prime is 1427987177711. The reversal of 1427987177689 is 9867717897241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1310154944400 + 117832233289 = 1144620^2 + 343267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427987177689 - 2¹⁵ = 1427987144921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1427987174689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713993588844 + 713993588845.

It is an arithmetic number, because the mean of its divisors is an integer number (713993588845).

Almost surely, 2^{1427987177689} is an apocalyptic number.

It is an amenable number.

1427987177689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427987177689 is an equidigital number, since it uses as much as digits as its factorization.

1427987177689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 597445632, while the sum is 76.

The spelling of 1427987177689 in words is "one trillion, four hundred twenty-seven billion, nine hundred eighty-seven million, one hundred seventy-seven thousand, six hundred eighty-nine".