123786000091 has 6 divisors (see below), whose sum is σ = 134040461820. Its totient is φ = 114263999928.

The previous prime is 123786000073. The next prime is 123786000109. The reversal of 123786000091 is 190000687321.

It is an interprime number because it is at equal distance from previous prime (123786000073) and next prime (123786000109).

It is not a de Polignac number, because 123786000091 - 2⁵ = 123786000059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123786000091.

It is not an unprimeable number, because it can be changed into a prime (123786000691) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 366230601 + ... + 366230938.

It is an arithmetic number, because the mean of its divisors is an integer number (22340076970).

Almost surely, 2^123786000091 is an apocalyptic number.

123786000091 is the 203131-st hex number.

123786000091 is a deficient number, since it is larger than the sum of its proper divisors (10254461729).

123786000091 is an equidigital number, since it uses as much as digits as its factorization.

123786000091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732461565 (or 732461552 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 123786000091 in words is "one hundred twenty-three billion, seven hundred eighty-six million, ninety-one", and thus it is an aban number.