123687445451 has 2 divisors, whose sum is σ = 123687445452. Its totient is φ = 123687445450.

The previous prime is 123687445439. The next prime is 123687445459. The reversal of 123687445451 is 154544786321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123687445451 - 2²² = 123683251147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123687445451.

It is not a weakly prime, because it can be changed into another prime (123687445459) 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, 61843722725 + 61843722726.

It is an arithmetic number, because the mean of its divisors is an integer number (61843722726).

Almost surely, 2^123687445451 is an apocalyptic number.

123687445451 is a deficient number, since it is larger than the sum of its proper divisors (1).

123687445451 is an equidigital number, since it uses as much as digits as its factorization.

123687445451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3225600, while the sum is 50.

The spelling of 123687445451 in words is "one hundred twenty-three billion, six hundred eighty-seven million, four hundred forty-five thousand, four hundred fifty-one".