123086851 has 4 divisors (see below), whose sum is σ = 130327272. Its totient is φ = 115846432.

The previous prime is 123086779. The next prime is 123086867. The reversal of 123086851 is 158680321.

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

It is not a de Polignac number, because 123086851 - 2¹¹ = 123084803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123086881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3620185 + ... + 3620218.

It is an arithmetic number, because the mean of its divisors is an integer number (32581818).

Almost surely, 2^123086851 is an apocalyptic number.

123086851 is a deficient number, since it is larger than the sum of its proper divisors (7240421).

123086851 is an equidigital number, since it uses as much as digits as its factorization.

123086851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7240420.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 123086851 is about 11094.4513609281. The cubic root of 123086851 is about 497.4360090418.

The spelling of 123086851 in words is "one hundred twenty-three million, eighty-six thousand, eight hundred fifty-one".