1011840913 has 2 divisors, whose sum is σ = 1011840914. Its totient is φ = 1011840912.

The previous prime is 1011840871. The next prime is 1011840917. The reversal of 1011840913 is 3190481101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576576144 + 435264769 = 24012^2 + 20863^2 .

It is an emirp because it is prime and its reverse (3190481101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011840913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011840917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505920456 + 505920457.

It is an arithmetic number, because the mean of its divisors is an integer number (505920457).

Almost surely, 2^1011840913 is an apocalyptic number.

It is an amenable number.

1011840913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011840913 is an equidigital number, since it uses as much as digits as its factorization.

1011840913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 1011840913 is about 31809.4469143995. The cubic root of 1011840913 is about 1003.9314940983.

The spelling of 1011840913 in words is "one billion, eleven million, eight hundred forty thousand, nine hundred thirteen".