123775492693 has 4 divisors (see below), whose sum is σ = 123779350828. Its totient is φ = 123771634560.

The previous prime is 123775492691. The next prime is 123775492717. The reversal of 123775492693 is 396294577321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 396294577321 = 8161 ⋅48559561.

It can be written as a sum of positive squares in 2 ways, for example, as 77260649764 + 46514842929 = 277958^2 + 215673^2 .

It is a cyclic number.

It is not a de Polignac number, because 123775492693 - 2¹ = 123775492691 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 (123775492691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1880538 + ... + 1945243.

It is an arithmetic number, because the mean of its divisors is an integer number (30944837707).

Almost surely, 2^123775492693 is an apocalyptic number.

It is an amenable number.

123775492693 is a deficient number, since it is larger than the sum of its proper divisors (3858135).

123775492693 is an equidigital number, since it uses as much as digits as its factorization.

123775492693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858134.

The product of its digits is 17146080, while the sum is 58.

The spelling of 123775492693 in words is "one hundred twenty-three billion, seven hundred seventy-five million, four hundred ninety-two thousand, six hundred ninety-three".