85129907 has 4 divisors (see below), whose sum is σ = 85382856. Its totient is φ = 84876960.

The previous prime is 85129903. The next prime is 85129909. The reversal of 85129907 is 70992158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70992158 = 2 ⋅35496079.

It is a cyclic number.

It is not a de Polignac number, because 85129907 - 2² = 85129903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85129903) 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, 125969 + ... + 126642.

It is an arithmetic number, because the mean of its divisors is an integer number (21345714).

Almost surely, 2^85129907 is an apocalyptic number.

85129907 is a deficient number, since it is larger than the sum of its proper divisors (252949).

85129907 is a wasteful number, since it uses less digits than its factorization.

85129907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252948.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 85129907 is about 9226.5869637694. The cubic root of 85129907 is about 439.9068449484.

The spelling of 85129907 in words is "eighty-five million, one hundred twenty-nine thousand, nine hundred seven".