1009987211 has 4 divisors (see below), whose sum is σ = 1010667000. Its totient is φ = 1009307424.

The previous prime is 1009987177. The next prime is 1009987213. The reversal of 1009987211 is 1127899001.

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

It is a cyclic number.

It is not a de Polignac number, because 1009987211 - 2²⁶ = 942878347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009987213) 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, 337661 + ... + 340638.

It is an arithmetic number, because the mean of its divisors is an integer number (252666750).

Almost surely, 2^1009987211 is an apocalyptic number.

1009987211 is a deficient number, since it is larger than the sum of its proper divisors (679789).

1009987211 is an equidigital number, since it uses as much as digits as its factorization.

1009987211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679788.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 1009987211 is about 31780.2959551984. The cubic root of 1009987211 is about 1003.3180487095.

The spelling of 1009987211 in words is "one billion, nine million, nine hundred eighty-seven thousand, two hundred eleven".