987654231 has 6 divisors (see below), whose sum is σ = 1426611680. Its totient is φ = 658436148.

The previous prime is 987654223. The next prime is 987654251. The reversal of 987654231 is 132456789.

987654231 is a `hidden beast` number, since 9 + 8 + 76 + 542 + 31 = 666.

It is not a de Polignac number, because 987654231 - 2³ = 987654223 is a prime.

It is a super-2 number, since 2×987654231² = 1950921760024402722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987654211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54869671 + ... + 54869688.

Almost surely, 2^987654231 is an apocalyptic number.

987654231 is a deficient number, since it is larger than the sum of its proper divisors (438957449).

987654231 is a wasteful number, since it uses less digits than its factorization.

987654231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109739365 (or 109739362 counting only the distinct ones).

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

The square root of 987654231 is about 31426.9666210406. The cubic root of 987654231 is about 995.8676912118.

The spelling of 987654231 in words is "nine hundred eighty-seven million, six hundred fifty-four thousand, two hundred thirty-one".