1009200989 has 8 divisors (see below), whose sum is σ = 1026048600. Its totient is φ = 992488000.

The previous prime is 1009200977. The next prime is 1009201027. The reversal of 1009200989 is 9890029001.

It can be written as a sum of positive squares in 4 ways, for example, as 140896900 + 868304089 = 11870^2 + 29467^2 .

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 1009200989 - 2¹² = 1009196893 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 (1009200949) 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, 18482 + ... + 48579.

It is an arithmetic number, because the mean of its divisors is an integer number (128256075).

Almost surely, 2^1009200989 is an apocalyptic number.

It is an amenable number.

1009200989 is a deficient number, since it is larger than the sum of its proper divisors (16847611).

1009200989 is a wasteful number, since it uses less digits than its factorization.

1009200989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67311.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1009200989 is about 31767.9239013191. The cubic root of 1009200989 is about 1003.0576376565.

The spelling of 1009200989 in words is "one billion, nine million, two hundred thousand, nine hundred eighty-nine".