123806434693 has 4 divisors (see below), whose sum is σ = 123816627468. Its totient is φ = 123796241920.

The previous prime is 123806434691. The next prime is 123806434727. The reversal of 123806434693 is 396434608321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26133308964 + 97673125729 = 161658^2 + 312527^2 .

It is a cyclic number.

It is not a de Polignac number, because 123806434693 - 2¹ = 123806434691 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 (123806434691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5078146 + ... + 5102467.

It is an arithmetic number, because the mean of its divisors is an integer number (30954156867).

Almost surely, 2^123806434693 is an apocalyptic number.

It is an amenable number.

123806434693 is a deficient number, since it is larger than the sum of its proper divisors (10192775).

123806434693 is a wasteful number, since it uses less digits than its factorization.

123806434693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10192774.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 123806434693 in words is "one hundred twenty-three billion, eight hundred six million, four hundred thirty-four thousand, six hundred ninety-three".