123782321497 has 2 divisors, whose sum is σ = 123782321498. Its totient is φ = 123782321496.

The previous prime is 123782321461. The next prime is 123782321539. The reversal of 123782321497 is 794123287321.

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., 94153240336 + 29629081161 = 306844^2 + 172131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123782321497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123782321497.

It is not a weakly prime, because it can be changed into another prime (123782321297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61891160748 + 61891160749.

It is an arithmetic number, because the mean of its divisors is an integer number (61891160749).

Almost surely, 2^123782321497 is an apocalyptic number.

It is an amenable number.

123782321497 is a deficient number, since it is larger than the sum of its proper divisors (1).

123782321497 is an equidigital number, since it uses as much as digits as its factorization.

123782321497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The spelling of 123782321497 in words is "one hundred twenty-three billion, seven hundred eighty-two million, three hundred twenty-one thousand, four hundred ninety-seven".