123456678887 has 2 divisors, whose sum is σ = 123456678888. Its totient is φ = 123456678886.

The previous prime is 123456678883. The next prime is 123456678907. The reversal of 123456678887 is 788876654321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123456678887 - 2² = 123456678883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123456678883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61728339443 + 61728339444.

It is an arithmetic number, because the mean of its divisors is an integer number (61728339444).

Almost surely, 2^123456678887 is an apocalyptic number.

123456678887 is a deficient number, since it is larger than the sum of its proper divisors (1).

123456678887 is an equidigital number, since it uses as much as digits as its factorization.

123456678887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108380160, while the sum is 65.

The spelling of 123456678887 in words is "one hundred twenty-three billion, four hundred fifty-six million, six hundred seventy-eight thousand, eight hundred eighty-seven".