85138043 has 2 divisors, whose sum is σ = 85138044. Its totient is φ = 85138042.

The previous prime is 85138037. The next prime is 85138061. The reversal of 85138043 is 34083158.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85138043 - 2¹² = 85133947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85138013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42569021 + 42569022.

It is an arithmetic number, because the mean of its divisors is an integer number (42569022).

Almost surely, 2^85138043 is an apocalyptic number.

85138043 is a deficient number, since it is larger than the sum of its proper divisors (1).

85138043 is an equidigital number, since it uses as much as digits as its factorization.

85138043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 85138043 is about 9227.0278529980. The cubic root of 85138043 is about 439.9208586999.

The spelling of 85138043 in words is "eighty-five million, one hundred thirty-eight thousand, forty-three".