85399994 has 4 divisors (see below), whose sum is σ = 128099994. Its totient is φ = 42699996.

The previous prime is 85399981. The next prime is 85400023. The reversal of 85399994 is 49999358.

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

It can be written as a sum of positive squares in only one way, i.e., 67650625 + 17749369 = 8225^2 + 4213^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21349997 + ... + 21350000.

Almost surely, 2^85399994 is an apocalyptic number.

85399994 is a deficient number, since it is larger than the sum of its proper divisors (42700000).

85399994 is a wasteful number, since it uses less digits than its factorization.

85399994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42699999.

The product of its digits is 3149280, while the sum is 56.

The square root of 85399994 is about 9241.2117170856. The cubic root of 85399994 is about 440.3715766139.

The spelling of 85399994 in words is "eighty-five million, three hundred ninety-nine thousand, nine hundred ninety-four".