99865069 has 2 divisors, whose sum is σ = 99865070. Its totient is φ = 99865068.

The previous prime is 99865061. The next prime is 99865079. The reversal of 99865069 is 96056899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83503044 + 16362025 = 9138^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 99865069 - 2³ = 99865061 is a prime.

It is a super-2 number, since 2×99865069² = 19946064012749522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99865061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49932534 + 49932535.

It is an arithmetic number, because the mean of its divisors is an integer number (49932535).

Almost surely, 2^99865069 is an apocalyptic number.

It is an amenable number.

99865069 is a deficient number, since it is larger than the sum of its proper divisors (1).

99865069 is an equidigital number, since it uses as much as digits as its factorization.

99865069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 99865069 is about 9993.2511726665. The cubic root of 99865069 is about 463.9500246537.

The spelling of 99865069 in words is "ninety-nine million, eight hundred sixty-five thousand, sixty-nine".