1009320381 has 24 divisors (see below), whose sum is σ = 1506355136. Its totient is φ = 650825280.

The previous prime is 1009320359. The next prime is 1009320383. The reversal of 1009320381 is 1830239001.

It is not a de Polignac number, because 1009320381 - 2¹⁰ = 1009319357 is a prime.

It is a super-2 number, since 2×1009320381² = 2037455263003970322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009320383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27201 + ... + 52521.

Almost surely, 2^1009320381 is an apocalyptic number.

It is an amenable number.

1009320381 is a deficient number, since it is larger than the sum of its proper divisors (497034755).

1009320381 is a wasteful number, since it uses less digits than its factorization.

1009320381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25473 (or 25470 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1009320381 is about 31769.8029738933. The cubic root of 1009320381 is about 1003.0971911702.

Adding to 1009320381 its reverse (1830239001), we get a palindrome (2839559382).

The spelling of 1009320381 in words is "one billion, nine million, three hundred twenty thousand, three hundred eighty-one".