1009911823 has 2 divisors, whose sum is σ = 1009911824. Its totient is φ = 1009911822.

The previous prime is 1009911821. The next prime is 1009911871. The reversal of 1009911823 is 3281199001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1009911823 - 2¹ = 1009911821 is a prime.

Together with 1009911821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009911821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504955911 + 504955912.

It is an arithmetic number, because the mean of its divisors is an integer number (504955912).

Almost surely, 2^1009911823 is an apocalyptic number.

1009911823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009911823 is an equidigital number, since it uses as much as digits as its factorization.

1009911823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1009911823 is about 31779.1098522284. The cubic root of 1009911823 is about 1003.2930846894.

The spelling of 1009911823 in words is "one billion, nine million, nine hundred eleven thousand, eight hundred twenty-three".