85726139 has 4 divisors (see below), whose sum is σ = 86811360. Its totient is φ = 84640920.

The previous prime is 85726127. The next prime is 85726141. The reversal of 85726139 is 93162758.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85726139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85726096 and 85726105.

It is not an unprimeable number, because it can be changed into a prime (85726159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542492 + ... + 542649.

It is an arithmetic number, because the mean of its divisors is an integer number (21702840).

Almost surely, 2^85726139 is an apocalyptic number.

85726139 is a deficient number, since it is larger than the sum of its proper divisors (1085221).

85726139 is a wasteful number, since it uses less digits than its factorization.

85726139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085220.

The product of its digits is 90720, while the sum is 41.

The square root of 85726139 is about 9258.8411261885. The cubic root of 85726139 is about 440.9314616604.

The spelling of 85726139 in words is "eighty-five million, seven hundred twenty-six thousand, one hundred thirty-nine".