123806311 has 4 divisors (see below), whose sum is σ = 123836400. Its totient is φ = 123776224.

The previous prime is 123806297. The next prime is 123806377. The reversal of 123806311 is 113608321.

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 123806311 - 2¹⁷ = 123675239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123806381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7666 + ... + 17503.

It is an arithmetic number, because the mean of its divisors is an integer number (30959100).

Almost surely, 2^123806311 is an apocalyptic number.

123806311 is a deficient number, since it is larger than the sum of its proper divisors (30089).

123806311 is an equidigital number, since it uses as much as digits as its factorization.

123806311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30088.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 123806311 is about 11126.8284340148. The cubic root of 123806311 is about 498.4033213285.

The spelling of 123806311 in words is "one hundred twenty-three million, eight hundred six thousand, three hundred eleven".