899979653 has 2 divisors, whose sum is σ = 899979654. Its totient is φ = 899979652.

The previous prime is 899979629. The next prime is 899979667. The reversal of 899979653 is 356979998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808719844 + 91259809 = 28438^2 + 9553^2 .

It is a cyclic number.

It is not a de Polignac number, because 899979653 - 2²² = 895785349 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 899979653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899979853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449989826 + 449989827.

It is an arithmetic number, because the mean of its divisors is an integer number (449989827).

Almost surely, 2^899979653 is an apocalyptic number.

It is an amenable number.

899979653 is a deficient number, since it is larger than the sum of its proper divisors (1).

899979653 is an equidigital number, since it uses as much as digits as its factorization.

899979653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33067440, while the sum is 65.

The square root of 899979653 is about 29999.6608814166. The cubic root of 899979653 is about 965.4821086943.

The spelling of 899979653 in words is "eight hundred ninety-nine million, nine hundred seventy-nine thousand, six hundred fifty-three".