123242400397 has 2 divisors, whose sum is σ = 123242400398. Its totient is φ = 123242400396.

The previous prime is 123242400293. The next prime is 123242400403. The reversal of 123242400397 is 793004242321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111996646281 + 11245754116 = 334659^2 + 106046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123242400397 is a prime.

It is a super-2 number, since 2×123242400397² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123242400097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621200198 + 61621200199.

It is an arithmetic number, because the mean of its divisors is an integer number (61621200199).

Almost surely, 2^123242400397 is an apocalyptic number.

It is an amenable number.

123242400397 is a deficient number, since it is larger than the sum of its proper divisors (1).

123242400397 is an equidigital number, since it uses as much as digits as its factorization.

123242400397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 123242400397 in words is "one hundred twenty-three billion, two hundred forty-two million, four hundred thousand, three hundred ninety-seven".