123427869449 has 2 divisors, whose sum is σ = 123427869450. Its totient is φ = 123427869448.

The previous prime is 123427869443. The next prime is 123427869457. The reversal of 123427869449 is 944968724321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74024805625 + 49403063824 = 272075^2 + 222268^2 .

It is a cyclic number.

It is not a de Polignac number, because 123427869449 - 2²⁸ = 123159433993 is a prime.

It is not a weakly prime, because it can be changed into another prime (123427869443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61713934724 + 61713934725.

It is an arithmetic number, because the mean of its divisors is an integer number (61713934725).

Almost surely, 2^123427869449 is an apocalyptic number.

It is an amenable number.

123427869449 is a deficient number, since it is larger than the sum of its proper divisors (1).

123427869449 is an equidigital number, since it uses as much as digits as its factorization.

123427869449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 59.

The spelling of 123427869449 in words is "one hundred twenty-three billion, four hundred twenty-seven million, eight hundred sixty-nine thousand, four hundred forty-nine".