1009382021 has 4 divisors (see below), whose sum is σ = 1068757452. Its totient is φ = 950006592.

The previous prime is 1009382009. The next prime is 1009382053. The reversal of 1009382021 is 1202839001.

1009382021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 937216996 + 72165025 = 30614^2 + 8495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009382021 - 2²² = 1005187717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009312021) 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, 29687690 + ... + 29687723.

It is an arithmetic number, because the mean of its divisors is an integer number (267189363).

Almost surely, 2^1009382021 is an apocalyptic number.

It is an amenable number.

1009382021 is a deficient number, since it is larger than the sum of its proper divisors (59375431).

1009382021 is an equidigital number, since it uses as much as digits as its factorization.

1009382021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59375430.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1009382021 is about 31770.7730626751. The cubic root of 1009382021 is about 1003.1176107361.

The spelling of 1009382021 in words is "one billion, nine million, three hundred eighty-two thousand, twenty-one".