85015123 has 2 divisors, whose sum is σ = 85015124. Its totient is φ = 85015122.

The previous prime is 85015109. The next prime is 85015163. The reversal of 85015123 is 32151058.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85015123 is a prime.

It is a super-2 number, since 2×85015123² = 14455142277410258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85015163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42507561 + 42507562.

It is an arithmetic number, because the mean of its divisors is an integer number (42507562).

Almost surely, 2^85015123 is an apocalyptic number.

85015123 is a deficient number, since it is larger than the sum of its proper divisors (1).

85015123 is an equidigital number, since it uses as much as digits as its factorization.

85015123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 85015123 is about 9220.3645806443. The cubic root of 85015123 is about 439.7090414558.

The spelling of 85015123 in words is "eighty-five million, fifteen thousand, one hundred twenty-three".