987654329 has 8 divisors (see below), whose sum is σ = 993117000. Its totient is φ = 982202112.

The previous prime is 987654323. The next prime is 987654337. The reversal of 987654329 is 923456789.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 179560000 + 808094329 = 13400^2 + 28427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 987654329 - 2¹² = 987650233 is a prime.

It is a super-2 number, since 2×987654329² = 1950922147184880482, which contains 22 as substring.

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 (987654323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252017 + ... + 255905.

It is an arithmetic number, because the mean of its divisors is an integer number (124139625).

Almost surely, 2^987654329 is an apocalyptic number.

It is an amenable number.

987654329 is a deficient number, since it is larger than the sum of its proper divisors (5462671).

987654329 is a wasteful number, since it uses less digits than its factorization.

987654329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227.

The product of its digits is 3265920, while the sum is 53.

The square root of 987654329 is about 31426.9681802111. The cubic root of 987654329 is about 995.8677241501.

It can be divided in two parts, 98765432 and 9, that multiplied together give a palindrome (888888888).

The spelling of 987654329 in words is "nine hundred eighty-seven million, six hundred fifty-four thousand, three hundred twenty-nine".