85399907 has 4 divisors (see below), whose sum is σ = 87011280. Its totient is φ = 83788536.

The previous prime is 85399903. The next prime is 85399921. The reversal of 85399907 is 70999358.

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

It is a cyclic number.

It is not a de Polignac number, because 85399907 - 2² = 85399903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85399901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805607 + ... + 805712.

It is an arithmetic number, because the mean of its divisors is an integer number (21752820).

Almost surely, 2^85399907 is an apocalyptic number.

85399907 is a deficient number, since it is larger than the sum of its proper divisors (1611373).

85399907 is a wasteful number, since it uses less digits than its factorization.

85399907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611372.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 85399907 is about 9241.2070099095. The cubic root of 85399907 is about 440.3714270732.

The spelling of 85399907 in words is "eighty-five million, three hundred ninety-nine thousand, nine hundred seven".