123771773 has 2 divisors, whose sum is σ = 123771774. Its totient is φ = 123771772.

The previous prime is 123771761. The next prime is 123771779. The reversal of 123771773 is 377177321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119290084 + 4481689 = 10922^2 + 2117^2 .

It is an emirp because it is prime and its reverse (377177321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123771773 - 2⁸ = 123771517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123771779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61885886 + 61885887.

It is an arithmetic number, because the mean of its divisors is an integer number (61885887).

Almost surely, 2^123771773 is an apocalyptic number.

It is an amenable number.

123771773 is a deficient number, since it is larger than the sum of its proper divisors (1).

123771773 is an equidigital number, since it uses as much as digits as its factorization.

123771773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43218, while the sum is 38.

The square root of 123771773 is about 11125.2763111754. The cubic root of 123771773 is about 498.3569708242.

The spelling of 123771773 in words is "one hundred twenty-three million, seven hundred seventy-one thousand, seven hundred seventy-three".