100987994593 has 2 divisors, whose sum is σ = 100987994594. Its totient is φ = 100987994592.

The previous prime is 100987994581. The next prime is 100987994603. The reversal of 100987994593 is 395499789001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91141798609 + 9846195984 = 301897^2 + 99228^2 .

It is a cyclic number.

It is not a de Polignac number, because 100987994593 - 2¹⁷ = 100987863521 is a prime.

It is not a weakly prime, because it can be changed into another prime (100987494593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50493997296 + 50493997297.

It is an arithmetic number, because the mean of its divisors is an integer number (50493997297).

Almost surely, 2^100987994593 is an apocalyptic number.

It is an amenable number.

100987994593 is a deficient number, since it is larger than the sum of its proper divisors (1).

100987994593 is an equidigital number, since it uses as much as digits as its factorization.

100987994593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22044960, while the sum is 64.

The spelling of 100987994593 in words is "one hundred billion, nine hundred eighty-seven million, nine hundred ninety-four thousand, five hundred ninety-three".