1987260051443 has 2 divisors, whose sum is σ = 1987260051444. Its totient is φ = 1987260051442.

The previous prime is 1987260051383. The next prime is 1987260051499. The reversal of 1987260051443 is 3441500627891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1987260051443 is a prime.

It is a super-2 number, since 2×1987260051443² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1987260051391 and 1987260051400.

It is not a weakly prime, because it can be changed into another prime (1987260051143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993630025721 + 993630025722.

It is an arithmetic number, because the mean of its divisors is an integer number (993630025722).

It is a 3-persistent number, because k⋅1987260051443 is pandigital for 1 ≤ k ≤ 3, but not for k = 4.

Almost surely, 2^{1987260051443} is an apocalyptic number.

1987260051443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987260051443 is an equidigital number, since it uses as much as digits as its factorization.

1987260051443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 1987260051443 in words is "one trillion, nine hundred eighty-seven billion, two hundred sixty million, fifty-one thousand, four hundred forty-three".