85123699 has 2 divisors, whose sum is σ = 85123700. Its totient is φ = 85123698.

The previous prime is 85123681. The next prime is 85123711. The reversal of 85123699 is 99632158.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85123699 - 2¹¹ = 85121651 is a prime.

It is not a weakly prime, because it can be changed into another prime (85123679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42561849 + 42561850.

It is an arithmetic number, because the mean of its divisors is an integer number (42561850).

Almost surely, 2^85123699 is an apocalyptic number.

85123699 is a deficient number, since it is larger than the sum of its proper divisors (1).

85123699 is an equidigital number, since it uses as much as digits as its factorization.

85123699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 85123699 is about 9226.2505385449. The cubic root of 85123699 is about 439.8961514558.

The spelling of 85123699 in words is "eighty-five million, one hundred twenty-three thousand, six hundred ninety-nine".