85436139 has 8 divisors (see below), whose sum is σ = 113978880. Its totient is φ = 56925416.

The previous prime is 85436129. The next prime is 85436149. The reversal of 85436139 is 93163458.

It is an interprime number because it is at equal distance from previous prime (85436129) and next prime (85436149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85436139 - 2⁴ = 85436123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85436097 and 85436106.

It is not an unprimeable number, because it can be changed into a prime (85436119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867 + ... + 13100.

It is an arithmetic number, because the mean of its divisors is an integer number (14247360).

Almost surely, 2^85436139 is an apocalyptic number.

85436139 is a deficient number, since it is larger than the sum of its proper divisors (28542741).

85436139 is a wasteful number, since it uses less digits than its factorization.

85436139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16009.

The product of its digits is 77760, while the sum is 39.

The square root of 85436139 is about 9243.1671520102. The cubic root of 85436139 is about 440.4336959998.

The spelling of 85436139 in words is "eighty-five million, four hundred thirty-six thousand, one hundred thirty-nine".