987654211 has 2 divisors, whose sum is σ = 987654212. Its totient is φ = 987654210.

The previous prime is 987654197. The next prime is 987654223. The reversal of 987654211 is 112456789.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 987654211 - 2⁵ = 987654179 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (987654251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493827105 + 493827106.

It is an arithmetic number, because the mean of its divisors is an integer number (493827106).

Almost surely, 2^987654211 is an apocalyptic number.

987654211 is a deficient number, since it is larger than the sum of its proper divisors (1).

987654211 is an equidigital number, since it uses as much as digits as its factorization.

987654211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 987654211 is about 31426.9663028425. The cubic root of 987654211 is about 995.8676844897.

The spelling of 987654211 in words is "nine hundred eighty-seven million, six hundred fifty-four thousand, two hundred eleven".