987654123 has 12 divisors (see below), whose sum is σ = 1439701120. Its totient is φ = 652394736.

The previous prime is 987654121. The next prime is 987654133. The reversal of 987654123 is 321456789.

987654123 is a `hidden beast` number, since 9 + 87 + 6 + 541 + 23 = 666.

It is not a de Polignac number, because 987654123 - 2¹ = 987654121 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987654121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502411 + ... + 504372.

Almost surely, 2^987654123 is an apocalyptic number.

987654123 is a deficient number, since it is larger than the sum of its proper divisors (452046997).

987654123 is a wasteful number, since it uses less digits than its factorization.

987654123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006898 (or 1006895 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 987654123 is about 31426.9649027710. The cubic root of 987654123 is about 995.8676549124.

The spelling of 987654123 in words is "nine hundred eighty-seven million, six hundred fifty-four thousand, one hundred twenty-three".