1987900306451 has 2 divisors, whose sum is σ = 1987900306452. Its totient is φ = 1987900306450.

The previous prime is 1987900306321. The next prime is 1987900306477. The reversal of 1987900306451 is 1546030097891.

It is a strong prime.

It is an emirp because it is prime and its reverse (1546030097891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1987900306451 - 2¹⁰ = 1987900305427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1987900306393 and 1987900306402.

It is not a weakly prime, because it can be changed into another prime (1987900303451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993950153225 + 993950153226.

It is an arithmetic number, because the mean of its divisors is an integer number (993950153226).

Almost surely, 2^{1987900306451} is an apocalyptic number.

1987900306451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987900306451 is an equidigital number, since it uses as much as digits as its factorization.

1987900306451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 1987900306451 in words is "one trillion, nine hundred eighty-seven billion, nine hundred million, three hundred six thousand, four hundred fifty-one".