123444312502477 has 2 divisors, whose sum is σ = 123444312502478. Its totient is φ = 123444312502476.

The previous prime is 123444312502373. The next prime is 123444312502583. The reversal of 123444312502477 is 774205213444321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79371456992356 + 44072855510121 = 8909066^2 + 6638739^2 .

It is a cyclic number.

It is not a de Polignac number, because 123444312502477 - 2¹¹ = 123444312500429 is a prime.

It is a super-2 number, since 2×123444312502477² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123444312502477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123444312509477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61722156251238 + 61722156251239.

It is an arithmetic number, because the mean of its divisors is an integer number (61722156251239).

Almost surely, 2^{123444312502477} is an apocalyptic number.

It is an amenable number.

123444312502477 is a deficient number, since it is larger than the sum of its proper divisors (1).

123444312502477 is an equidigital number, since it uses as much as digits as its factorization.

123444312502477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4515840, while the sum is 49.

Adding to 123444312502477 its reverse (774205213444321), we get a palindrome (897649525946798).

The spelling of 123444312502477 in words is "one hundred twenty-three trillion, four hundred forty-four billion, three hundred twelve million, five hundred two thousand, four hundred seventy-seven".