1002022009 has 4 divisors (see below), whose sum is σ = 1002129316. Its totient is φ = 1001914704.

The previous prime is 1002022003. The next prime is 1002022027. The reversal of 1002022009 is 9002202001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 315843984 + 686178025 = 17772^2 + 26195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002022009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002021983 and 1002022001.

It is not an unprimeable number, because it can be changed into a prime (1002022003) 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, 38154 + ... + 58819.

It is an arithmetic number, because the mean of its divisors is an integer number (250532329).

Almost surely, 2^1002022009 is an apocalyptic number.

It is an amenable number.

1002022009 is a deficient number, since it is larger than the sum of its proper divisors (107307).

1002022009 is an equidigital number, since it uses as much as digits as its factorization.

1002022009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107306.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1002022009 is about 31654.7312261532. The cubic root of 1002022009 is about 1000.6735492296.

The spelling of 1002022009 in words is "one billion, two million, twenty-two thousand, nine".