99469861 has 2 divisors, whose sum is σ = 99469862. Its totient is φ = 99469860.

The previous prime is 99469859. The next prime is 99469889. The reversal of 99469861 is 16896499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82700836 + 16769025 = 9094^2 + 4095^2 .

It is an emirp because it is prime and its reverse (16896499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99469861 - 2¹ = 99469859 is a prime.

Together with 99469859, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 99469799 and 99469808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99469561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49734930 + 49734931.

It is an arithmetic number, because the mean of its divisors is an integer number (49734931).

Almost surely, 2^99469861 is an apocalyptic number.

It is an amenable number.

99469861 is a deficient number, since it is larger than the sum of its proper divisors (1).

99469861 is an equidigital number, since it uses as much as digits as its factorization.

99469861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 52.

The square root of 99469861 is about 9973.4578256490. The cubic root of 99469861 is about 463.3372005382.

The spelling of 99469861 in words is "ninety-nine million, four hundred sixty-nine thousand, eight hundred sixty-one".