85129897 has 8 divisors (see below), whose sum is σ = 90338976. Its totient is φ = 79943232.

The previous prime is 85129883. The next prime is 85129903. The reversal of 85129897 is 79892158.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85129897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85129897.

It is not an unprimeable number, because it can be changed into a prime (85129867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2578 + ... + 13300.

It is an arithmetic number, because the mean of its divisors is an integer number (11292372).

Almost surely, 2^85129897 is an apocalyptic number.

It is an amenable number.

85129897 is a deficient number, since it is larger than the sum of its proper divisors (5209079).

85129897 is a wasteful number, since it uses less digits than its factorization.

85129897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11207.

The product of its digits is 362880, while the sum is 49.

The square root of 85129897 is about 9226.5864218572. The cubic root of 85129897 is about 439.9068277235.

The spelling of 85129897 in words is "eighty-five million, one hundred twenty-nine thousand, eight hundred ninety-seven".