899644297 has 2 divisors, whose sum is σ = 899644298. Its totient is φ = 899644296.

The previous prime is 899644283. The next prime is 899644321. The reversal of 899644297 is 792446998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877403641 + 22240656 = 29621^2 + 4716^2 .

It is a cyclic number.

It is not a de Polignac number, because 899644297 - 2⁷ = 899644169 is a prime.

It is a super-2 number, since 2×899644297² = 1618719722249248418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (899644247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449822148 + 449822149.

It is an arithmetic number, because the mean of its divisors is an integer number (449822149).

Almost surely, 2^899644297 is an apocalyptic number.

It is an amenable number.

899644297 is a deficient number, since it is larger than the sum of its proper divisors (1).

899644297 is an equidigital number, since it uses as much as digits as its factorization.

899644297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The square root of 899644297 is about 29994.0710307887. The cubic root of 899644297 is about 965.3621724855.

The spelling of 899644297 in words is "eight hundred ninety-nine million, six hundred forty-four thousand, two hundred ninety-seven".