99985958999 has 2 divisors, whose sum is σ = 99985959000. Its totient is φ = 99985958998.

The previous prime is 99985958959. The next prime is 99985959013.

99985958999 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 99985958999 - 2¹⁶ = 99985893463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99985958959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992979499 + 49992979500.

It is an arithmetic number, because the mean of its divisors is an integer number (49992979500).

Almost surely, 2^99985958999 is an apocalyptic number.

99985958999 is a deficient number, since it is larger than the sum of its proper divisors (1).

99985958999 is an equidigital number, since it uses as much as digits as its factorization.

99985958999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7652750400, while the sum is 89.

The spelling of 99985958999 in words is "ninety-nine billion, nine hundred eighty-five million, nine hundred fifty-eight thousand, nine hundred ninety-nine".