9940819111 has 2 divisors, whose sum is σ = 9940819112. Its totient is φ = 9940819110.

The previous prime is 9940819103. The next prime is 9940819153. The reversal of 9940819111 is 1119180499.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9940819111 - 2³ = 9940819103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9940810111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4970409555 + 4970409556.

It is an arithmetic number, because the mean of its divisors is an integer number (4970409556).

Almost surely, 2^9940819111 is an apocalyptic number.

9940819111 is a deficient number, since it is larger than the sum of its proper divisors (1).

9940819111 is an equidigital number, since it uses as much as digits as its factorization.

9940819111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 43.

The square root of 9940819111 is about 99703.6564575242. The cubic root of 9940819111 is about 2150.1762329670.

The spelling of 9940819111 in words is "nine billion, nine hundred forty million, eight hundred nineteen thousand, one hundred eleven".