99123890611 has 4 divisors (see below), whose sum is σ = 100994152752. Its totient is φ = 97253628472.

The previous prime is 99123890609. The next prime is 99123890617. The reversal of 99123890611 is 11609832199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99123890611 - 2¹ = 99123890609 is a prime.

It is a super-2 number, since 2×99123890611² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99123890617) 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 in 3 ways as a sum of consecutive naturals, for example, 935130991 + ... + 935131096.

It is an arithmetic number, because the mean of its divisors is an integer number (25248538188).

Almost surely, 2^99123890611 is an apocalyptic number.

99123890611 is a deficient number, since it is larger than the sum of its proper divisors (1870262141).

99123890611 is a wasteful number, since it uses less digits than its factorization.

99123890611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870262140.

The product of its (nonzero) digits is 209952, while the sum is 49.

The spelling of 99123890611 in words is "ninety-nine billion, one hundred twenty-three million, eight hundred ninety thousand, six hundred eleven".