123555343493 has 2 divisors, whose sum is σ = 123555343494. Its totient is φ = 123555343492.

The previous prime is 123555343487. The next prime is 123555343537. The reversal of 123555343493 is 394343555321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123511479364 + 43864129 = 351442^2 + 6623^2 .

It is a cyclic number.

It is not a de Polignac number, because 123555343493 - 2¹⁶ = 123555277957 is a prime.

It is a super-3 number, since 3×123555343493³ (a number of 34 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123555343433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61777671746 + 61777671747.

It is an arithmetic number, because the mean of its divisors is an integer number (61777671747).

Almost surely, 2^123555343493 is an apocalyptic number.

It is an amenable number.

123555343493 is a deficient number, since it is larger than the sum of its proper divisors (1).

123555343493 is an equidigital number, since it uses as much as digits as its factorization.

123555343493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 47.

The spelling of 123555343493 in words is "one hundred twenty-three billion, five hundred fifty-five million, three hundred forty-three thousand, four hundred ninety-three".