85556123 has 2 divisors, whose sum is σ = 85556124. Its totient is φ = 85556122.

The previous prime is 85556117. The next prime is 85556161. The reversal of 85556123 is 32165558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85556123 - 2⁸ = 85555867 is a prime.

It is a super-2 number, since 2×85556123² = 14639700365582258, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (85556423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42778061 + 42778062.

It is an arithmetic number, because the mean of its divisors is an integer number (42778062).

Almost surely, 2^85556123 is an apocalyptic number.

85556123 is a deficient number, since it is larger than the sum of its proper divisors (1).

85556123 is an equidigital number, since it uses as much as digits as its factorization.

85556123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The square root of 85556123 is about 9249.6552908744. The cubic root of 85556123 is about 440.6397769335.

The spelling of 85556123 in words is "eighty-five million, five hundred fifty-six thousand, one hundred twenty-three".