329450981 has 6 divisors (see below), whose sum is σ = 340422246. Its totient is φ = 318822600.

The previous prime is 329450977. The next prime is 329451019. The reversal of 329450981 is 189054923.

It can be written as a sum of positive squares in only one way, i.e., 285441025 + 44009956 = 16895^2 + 6634^2 .

It is not a de Polignac number, because 329450981 - 2² = 329450977 is a prime.

It is a super-2 number, since 2×329450981² = 217075897763724722, 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329450911) 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, 170450 + ... + 172371.

It is an arithmetic number, because the mean of its divisors is an integer number (56737041).

Almost surely, 2^329450981 is an apocalyptic number.

329450981 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

329450981 is a deficient number, since it is larger than the sum of its proper divisors (10971265).

329450981 is an equidigital number, since it uses as much as digits as its factorization.

329450981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342883 (or 342852 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 329450981 is about 18150.7845835931. The cubic root of 329450981 is about 690.6588826384.

The spelling of 329450981 in words is "three hundred twenty-nine million, four hundred fifty thousand, nine hundred eighty-one".