899465569 has 2 divisors, whose sum is σ = 899465570. Its totient is φ = 899465568.

The previous prime is 899465549. The next prime is 899465573. The reversal of 899465569 is 965564998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 881317969 + 18147600 = 29687^2 + 4260^2 .

It is a cyclic number.

It is not a de Polignac number, because 899465569 - 2¹⁵ = 899432801 is a prime.

It is a super-2 number, since 2×899465569² = 1618076619632987522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (899465549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449732784 + 449732785.

It is an arithmetic number, because the mean of its divisors is an integer number (449732785).

Almost surely, 2^899465569 is an apocalyptic number.

It is an amenable number.

899465569 is a deficient number, since it is larger than the sum of its proper divisors (1).

899465569 is an equidigital number, since it uses as much as digits as its factorization.

899465569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20995200, while the sum is 61.

The square root of 899465569 is about 29991.0914939753. The cubic root of 899465569 is about 965.2982403004.

The spelling of 899465569 in words is "eight hundred ninety-nine million, four hundred sixty-five thousand, five hundred sixty-nine".