1987953891083 has 2 divisors, whose sum is σ = 1987953891084. Its totient is φ = 1987953891082.

The previous prime is 1987953891047. The next prime is 1987953891101. The reversal of 1987953891083 is 3801983597891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1987953891083 - 2⁸ = 1987953890827 is a prime.

It is a super-3 number, since 3×1987953891083³ (a number of 38 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1987953890998 and 1987953891016.

It is not a weakly prime, because it can be changed into another prime (1987953891883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993976945541 + 993976945542.

It is an arithmetic number, because the mean of its divisors is an integer number (993976945542).

Almost surely, 2^{1987953891083} is an apocalyptic number.

1987953891083 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987953891083 is an equidigital number, since it uses as much as digits as its factorization.

1987953891083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117573120, while the sum is 71.

The spelling of 1987953891083 in words is "one trillion, nine hundred eighty-seven billion, nine hundred fifty-three million, eight hundred ninety-one thousand, eighty-three".