899911693 has 2 divisors, whose sum is σ = 899911694. Its totient is φ = 899911692.

The previous prime is 899911637. The next prime is 899911699. The reversal of 899911693 is 396119998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 865654084 + 34257609 = 29422^2 + 5853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899911693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899911699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449955846 + 449955847.

It is an arithmetic number, because the mean of its divisors is an integer number (449955847).

Almost surely, 2^899911693 is an apocalyptic number.

It is an amenable number.

899911693 is a deficient number, since it is larger than the sum of its proper divisors (1).

899911693 is an equidigital number, since it uses as much as digits as its factorization.

899911693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 55.

The square root of 899911693 is about 29998.5281805625. The cubic root of 899911693 is about 965.4578059909.

The spelling of 899911693 in words is "eight hundred ninety-nine million, nine hundred eleven thousand, six hundred ninety-three".