623771773 has 2 divisors, whose sum is σ = 623771774. Its totient is φ = 623771772.

The previous prime is 623771761. The next prime is 623771783. The reversal of 623771773 is 377177326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394340164 + 229431609 = 19858^2 + 15147^2 .

It is a cyclic number.

It is not a de Polignac number, because 623771773 - 2⁹ = 623771261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623771713) 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 as a sum of consecutive naturals, namely, 311885886 + 311885887.

It is an arithmetic number, because the mean of its divisors is an integer number (311885887).

Almost surely, 2^623771773 is an apocalyptic number.

It is an amenable number.

623771773 is a deficient number, since it is larger than the sum of its proper divisors (1).

623771773 is an equidigital number, since it uses as much as digits as its factorization.

623771773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259308, while the sum is 43.

The square root of 623771773 is about 24975.4233797948. The cubic root of 623771773 is about 854.4275424313.

The spelling of 623771773 in words is "six hundred twenty-three million, seven hundred seventy-one thousand, seven hundred seventy-three".