996771909 has 16 divisors (see below), whose sum is σ = 1519629440. Its totient is φ = 569306880.

The previous prime is 996771899. The next prime is 996771943. The reversal of 996771909 is 909177699.

It is not a de Polignac number, because 996771909 - 2⁸ = 996771653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996770909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37497 + ... + 58305.

It is an arithmetic number, because the mean of its divisors is an integer number (94976840).

Almost surely, 2^996771909 is an apocalyptic number.

It is an amenable number.

996771909 is a deficient number, since it is larger than the sum of its proper divisors (522857531).

996771909 is a wasteful number, since it uses less digits than its factorization.

996771909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23100.

The product of its (nonzero) digits is 1928934, while the sum is 57.

The square root of 996771909 is about 31571.6947438683. The cubic root of 996771909 is about 998.9228097445.

The spelling of 996771909 in words is "nine hundred ninety-six million, seven hundred seventy-one thousand, nine hundred nine".