9920329 has 8 divisors (see below), whose sum is σ = 10247688. Its totient is φ = 9596160.

The previous prime is 9920311. The next prime is 9920347. The reversal of 9920329 is 9230299.

It is an interprime number because it is at equal distance from previous prime (9920311) and next prime (9920347).

It can be written as a sum of positive squares in 4 ways, for example, as 4721929 + 5198400 = 2173^2 + 2280^2 .

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 9920329 - 2¹³ = 9912137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9920294 and 9920303.

It is not an unprimeable number, because it can be changed into a prime (9920399) 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, 6609 + ... + 7969.

It is an arithmetic number, because the mean of its divisors is an integer number (1280961).

Almost surely, 2^9920329 is an apocalyptic number.

It is an amenable number.

9920329 is a deficient number, since it is larger than the sum of its proper divisors (327359).

9920329 is a wasteful number, since it uses less digits than its factorization.

9920329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 9920329 is about 3149.6553779739. The cubic root of 9920329 is about 214.8697895539.

The spelling of 9920329 in words is "nine million, nine hundred twenty thousand, three hundred twenty-nine".