85223429 has 2 divisors, whose sum is σ = 85223430. Its totient is φ = 85223428.

The previous prime is 85223419. The next prime is 85223447. The reversal of 85223429 is 92432258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44289025 + 40934404 = 6655^2 + 6398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85223429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85223419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42611714 + 42611715.

It is an arithmetic number, because the mean of its divisors is an integer number (42611715).

Almost surely, 2^85223429 is an apocalyptic number.

It is an amenable number.

85223429 is a deficient number, since it is larger than the sum of its proper divisors (1).

85223429 is an equidigital number, since it uses as much as digits as its factorization.

85223429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 85223429 is about 9231.6536438495. The cubic root of 85223429 is about 440.0678769251.

The spelling of 85223429 in words is "eighty-five million, two hundred twenty-three thousand, four hundred twenty-nine".