1009730321 has 4 divisors (see below), whose sum is σ = 1019533632. Its totient is φ = 999927012.

The previous prime is 1009730303. The next prime is 1009730341. The reversal of 1009730321 is 1230379001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1230379001 = 7607 ⋅161743.

It is a cyclic number.

It is not a de Polignac number, because 1009730321 - 2¹⁴ = 1009713937 is a prime.

It is a super-2 number, since 2×1009730321² = 2039110642293526082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009730341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4901501 + ... + 4901706.

It is an arithmetic number, because the mean of its divisors is an integer number (254883408).

Almost surely, 2^1009730321 is an apocalyptic number.

It is an amenable number.

1009730321 is a deficient number, since it is larger than the sum of its proper divisors (9803311).

1009730321 is an equidigital number, since it uses as much as digits as its factorization.

1009730321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9803310.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 1009730321 is about 31776.2540429170. The cubic root of 1009730321 is about 1003.2329769297.

The spelling of 1009730321 in words is "one billion, nine million, seven hundred thirty thousand, three hundred twenty-one".