911009993 has 2 divisors, whose sum is σ = 911009994. Its totient is φ = 911009992.

The previous prime is 911009969. The next prime is 911009999. The reversal of 911009993 is 399900119.

911009993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 727488784 + 183521209 = 26972^2 + 13547^2 .

It is a cyclic number.

It is not a de Polignac number, because 911009993 - 2¹⁴ = 910993609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 911009993.

It is not a weakly prime, because it can be changed into another prime (911009999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455504996 + 455504997.

It is an arithmetic number, because the mean of its divisors is an integer number (455504997).

Almost surely, 2^911009993 is an apocalyptic number.

It is an amenable number.

911009993 is a deficient number, since it is larger than the sum of its proper divisors (1).

911009993 is an equidigital number, since it uses as much as digits as its factorization.

911009993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19683, while the sum is 41.

The square root of 911009993 is about 30182.9420865495. The cubic root of 911009993 is about 969.4104870889.

The spelling of 911009993 in words is "nine hundred eleven million, nine thousand, nine hundred ninety-three".