101558939987 has 2 divisors, whose sum is σ = 101558939988. Its totient is φ = 101558939986.

The previous prime is 101558939869. The next prime is 101558940031. The reversal of 101558939987 is 789939855101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101558939987 - 2⁸ = 101558939731 is a prime.

It is not a weakly prime, because it can be changed into another prime (101558936987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50779469993 + 50779469994.

It is an arithmetic number, because the mean of its divisors is an integer number (50779469994).

Almost surely, 2^101558939987 is an apocalyptic number.

101558939987 is a deficient number, since it is larger than the sum of its proper divisors (1).

101558939987 is an equidigital number, since it uses as much as digits as its factorization.

101558939987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 65.

The spelling of 101558939987 in words is "one hundred one billion, five hundred fifty-eight million, nine hundred thirty-nine thousand, nine hundred eighty-seven".