85139906 has 8 divisors (see below), whose sum is σ = 129248784. Its totient is φ = 42056980.

The previous prime is 85139881. The next prime is 85139917. The reversal of 85139906 is 60993158.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256280 + ... + 256611.

It is an arithmetic number, because the mean of its divisors is an integer number (16156098).

Almost surely, 2^85139906 is an apocalyptic number.

85139906 is a deficient number, since it is larger than the sum of its proper divisors (44108878).

85139906 is a wasteful number, since it uses less digits than its factorization.

85139906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512976.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 85139906 is about 9227.1288058637. The cubic root of 85139906 is about 439.9240674753.

The spelling of 85139906 in words is "eighty-five million, one hundred thirty-nine thousand, nine hundred six".